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SCHWEIZ BERGSTURZ BLATTEN

A man with a boy looks at the massive avalanche, triggered by the collapse of the Birch Glacier, swept down to the valley floor and demolishing the village of Blatten, Switzerland, on Friday, June 6, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

A general view past chapel after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

An aerial view shows devastated houses by the force of the massive avalanche, triggered by the collapse of the Birch Glacier, swept down to the valley floor and demolishing the village of Blatten, Switzerland, on Friday, June 6, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

An aerial view shows destroyed houses in the water from the river Lonza that formed a lake beside the massive avalanche, triggered by the collapse of the Birch Glacier, swept down to the valley floor and demolishing the village of Blatten, Switzerland, on Friday, June 6, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

An aerial view shows destroyed houses in the water from the river Lonza that formed a lake beside the massive avalanche, triggered by the collapse of the Birch Glacier, swept down to the valley floor and demolishing the village of Blatten, Switzerland, on Friday, June 6, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

Destroyed houses in the water from the river Lonza after the formation of a lake on the last houses of the village of Blatten, Switzerland, on Friday, June 6, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - A christian chapel is silhouetted against the massive avalanche, triggered by the collapse of the Birch Glacier, swept down to the valley floor and demolishing the village of Blatten, rear, beside the village of Wiler, front, Switzerland, on Friday, June 6, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

A wooden christian cross is silhouetted against the massive avalanche, triggered by the collapse of the Birch Glacier, swept down to the valley floor and demolishing the village of Blatten, rear, beside the village of Wiler, front, Switzerland, on Friday, June 6, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

A wooden christian cross is silhouetted against a general view showing the Loetschental valley with the massive avalanche, triggered by the collapse of the Birch Glacier, swept down to the valley floor and demolishing the village of Blatten, Switzerland, on Friday, June 6, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - An aerial view shows the water from the river Lonza flows over the mud and stone of the massive avalanche, triggered by the collapse of the Birch Glacier, swept down to the valley floor and demolishing the village of Blatten, Switzerland, on Friday, June 6, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - A general view past chapel after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - A general view after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, top, next to the village of Wiler, left, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - A general view past a wooden cross after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, top, next to the village of Wiler, center, and the village of Kippel, left, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

Destroyed houses in the water from the river Lonza after the formation of a lake on the last houses of the village of Blatten, after a massive avalanche, triggered by the collapse of the Birch Glacier, the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - The hamlet of Wyssried is seen above a massive avalanche, triggered by the collapse of the Birch Glacier, as it swept down to the valley floor and buried the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

The hamlet of Wyssried is seen above a massive avalanche, triggered by the collapse of the Birch Glacier, as it swept down to the valley floor and buried the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

Broken trees swept away by the mud and stone flow above the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

Workers build a temporary rescue road in direction of the hamlet of Wyssried, after a massive avalanche, triggered by the collapse of the Birch Glacier, swept down to the valley floor and demolishing the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

The hamlet of Wyssried, center, is seen above a massive avalanche, triggered by the collapse of the Birch Glacier, as it swept down to the valley floor and buried the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

A general view after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

Destroyed houses in the water from the river Lonza after the formation of a lake on the last houses of the village of Blatten, after a massive avalanche, triggered by the collapse of the Birch Glacier, the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

An aerial view after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

An aerial view shows water from the river Lonza flows over the mud and stone, after the formation of a lake on the last houses of the village of Blatten, after a massive avalanche, triggered by the collapse of the Birch Glacier, the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

An aerial view after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

An aerial view shows a destroyed house in the water from the river Lonza after the formation of a lake on the last houses of the village of Blatten, after a massive avalanche, triggered by the collapse of the Birch Glacier, the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - An aerial view shows a destroyed house in the water from the river Lonza after the formation of a lake on the last houses of the village of Blatten, after a massive avalanche, triggered by the collapse of the Birch Glacier, the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

An aerial view shows water from the river Lonza flows over the mud and stone, after the formation of a lake on the last houses of the village of Blatten, after a massive avalanche, triggered by the collapse of the Birch Glacier, the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - An aerial view after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, on Thursday, June 5, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Michael Buholzer)

SCHWEIZ BERGSTURZ BLATTEN

A aerial view captured after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, Friday, May 30, 2025. large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Global Glacier Initiative/Garrett Fisher)

SCHWEIZ BERGSTURZ BLATTEN

A aerial view captured after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, Thursday, May 29, 2025. large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Global Glacier Initiative/Garrett Fisher)

SCHWEIZ BERGSTURZ BLATTEN

A aerial view captured after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, Friday, May 30, 2025. large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Global Glacier Initiative/Garrett Fisher)

SCHWEIZ BERGSTURZ BLATTEN

A aerial view captured after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, Thursday, May 29, 2025. large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Global Glacier Initiative/Garrett Fisher)

SCHWEIZ BERGSTURZ BLATTEN

Christophe Darbellay Conseiller d'Etat (VS) parle aux journalistes lors d'une conference de presse du Conseil d'Etat du Valais en soutien aux habitants de Blatten ce mercredi 4 juin 2025 a Sion. Le 28 mai 2025 une grande partie du village de Blatten, situe dans la vallee du Loetschental, dans le canton du Valais, a ete ensevelie sous des masses de glace, de boue et de roche. (KEYSTONE/Cyril Zingaro)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - De gauche a droite, Franz Ruppen Conseiller d'Etat (VS), Christophe Darbellay Conseiller d'Etat (VS), Mathias Reynard, Conseiller d'Etat (VS), Franziska Biner, Conseillere d'Etat (VS), Stephane Ganzer, Conseiller d'Etat (VS), parlent lors d'une conference de presse du Conseil d'Etat du Valais en soutien aux habitants de Blatten ce mercredi 4 juin 2025 a Sion. Le 28 mai 2025 une grande partie du village de Blatten, situe dans la vallee du Loetschental, dans le canton du Valais, a ete ensevelie sous des masses de glace, de boue et de roche. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

De gauche a droite, Franz Ruppen Conseiller d'Etat (VS), Christophe Darbellay Conseiller d'Etat (VS), Mathias Reynard, Conseiller d'Etat (VS), Franziska Biner, Conseillere d'Etat (VS), Stephane Ganzer, Conseiller d'Etat (VS), parlent lors d'une conference de presse du Conseil d'Etat du Valais en soutien aux habitants de Blatten ce mercredi 4 juin 2025 a Sion. Le 28 mai 2025 une grande partie du village de Blatten, situe dans la vallee du Loetschental, dans le canton du Valais, a ete ensevelie sous des masses de glace, de boue et de roche. (KEYSTONE/Cyril Zingaro)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - A view of the Kleines Nesthorn mountain showing the trace of the rocks which broke off and slid towards the valley above the village of Blatten, Switzerland, Sunday, June 1, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

People are dropped off by helicopter onto the landslide Sunday, June 1, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - Journalists film the landslide a few days after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, Sunday, June 1, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - People are dropped off by helicopter onto the landslide Sunday, June 1, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

A view of the Ferden Dam, in Ferden, Switzerland, Sunday, June 1, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

A view of the Ferden Dam, in Ferden, Switzerland, Sunday, June 1, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

A view of the Ferden Dam, in Ferden, Switzerland, Sunday, June 1, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

Debris in the Lonza River flows over mud and stone after a lake formed over the last houses in the village of Blatten, Switzerland, Sunday, June 1, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

A helicopter flies over the landslide a few days after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, Sunday, June 1, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - Water from the Lonza river flows over the mud and stone, after the formation of a lake on the last houses of the village of Blatten, Switzerland Sunday, June 1, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

Check dams have been set up on the water from the Lonza river flows over the mud and stone, after the formation of a lake on the last houses of the village of Blatten, Sunday, June 1, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

A view captured a few days after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, Saturday, May 31, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - Swiss Federal Councillor Martin Pfister, arrive in Wiler, Switzerland, to talk to the locals, Saturday, May 31, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

Swiss Federal Councillor Martin Pfister, right, and Renato Kalbermatten, left, head of communications, arrive in Wiler, Switzerland, to talk to the locals, Saturday, May 31, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

From left to right, Raphael Mayoraz, Head of the Natural Risks Department, Franziska Biner State Councillor of Wallis, Matthias Bellwald, Mayor of Blatten, Matthias Ebener Chief Information Officer, speaks during a press conference, in Ferden, Switzerland, Saturday, May 31, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

Journalists film a helicopter a few days after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, Saturday, May 31, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

Journalists speak a few days after a massive avalanche, triggered by the collapse of the Birch Glacier, shows the destruction it caused as it swept down to the valley floor and demolishing the village of Blatten, Switzerland, Saturday, May 31, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

Water from the Lonza river flows over the mud and stone, after the formation of a lake on the last houses of the village of Blatten, Switzerland, after a massive avalanche, triggered by the collapse of the Birch Glacier, swept down to the valley floor and demolishing the village of Blatten, Switzerland Saturday, May 31, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

Water from the Lonza river flows over the mud and stone, after the formation of a lake on the last houses of the village of Blatten, Switzerland, after a massive avalanche, triggered by the collapse of the Birch Glacier, swept down to the valley floor and demolishing the village of Blatten, Switzerland Saturday, May 31, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

Water from the Lonza river flows over the mud and stone, after the formation of a lake on the last houses of the village of Blatten, Switzerland, after a massive avalanche, triggered by the collapse of the Birch Glacier, swept down to the valley floor and demolishing the village of Blatten, Switzerland Saturday, May 31, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

KEYPIX - SCHWEIZ BERGSTURZ BLATTEN

KEYPIX - Water from the Lonza river flows over the mud and stone, after the formation of a lake on the last houses of the village of Blatten, Switzerland, after a massive avalanche, triggered by the collapse of the Birch Glacier, swept down to the valley floor and demolishing the village of Blatten, Switzerland Saturday, May 31, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

Check dams have been set up on the water from the Lonza river flows over the mud and stone, after the formation of a lake on the last houses of the village of Blatten, Switzerland, Saturday, May 31, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

The road closed at the exit of the village of Wiler towards Blatten Saturday, May 31, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

A mechanical shovel installed preventively over the Lonza river, in Gampel-Steg Saturday, May 31, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Cyril Zingaro)

SCHWEIZ BERGSTURZ BLATTEN

This satellite image provided by Maxar Technologies shows the aftermath of a mudslide in Blatten, Switzerland, Friday May 30, 2025. (Maxar Technologies via AP)

SCHWEIZ BERGSTURZ BLATTEN

This satellite image provided by Maxar Technologies shows the aftermath of a mudslide in Blatten, Switzerland, Friday May 30, 2025. (Maxar Technologies via AP)

SCHWEIZ BERGSTURZ BLATTEN

This satellite image provided by Maxar Technologies shows the aftermath of a mudslide in Blatten, Switzerland, Friday May 30, 2025. (Maxar Technologies via AP)

SCHWEIZ BERGSTURZ BLATTEN

Swiss federal president Karin Keller-Sutter, speaks with journalists during a press conference in Ferden, Switzerland, Friday, May 30, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Jean-Christophe Bott)

SCHWEIZ BERGSTURZ BLATTEN

Swiss federal president Karin Keller-Sutter, speaks during a press conference in Ferden, Switzerland, Friday, May 30, 2025. A large part of the village of Blatten, located in the Loetschental Valley in the canton of Valais, was buried under masses of ice, mud, and rock. Numerous houses were destroyed, and one person is missing. Between May 19 and 28, several million cubic meters of rock fell from the Kleines Nesthorn mountain above Blatten. This created a nine-million-tonne debris cone on the Birch Glacier, which ultimately collapsed on May 28, 2025. (KEYSTONE/Jean-Christophe Bott)