Climate crisis could be destabilising mountain areas like Nepal, experts warn

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“Think of the high mountains like this as shattered bedrock glued together by ice-filled joints. As the permafrost and the ice-filled joints melt, then there’s the potential for these types of catastrophic failure.”

The thaw is altering the shape, colour and solidity of the landscape, creating or expanding glacial meltwater lakes and, in the long term, threatening the origin of many rivers and the drinking supplies of populations downstream. In many parts of Asia, hundreds of millions of people depend on the rivers such as the Ganges and the Brahmaputra that descend from the glaciers.

Scientists have high confidence that glacier retreat is caused by human-driven global heating. This has caused glacier collapses from the Alps to the Andes. In the Langtang catchment area in Nepal, glacier loss rates have increased more than fourfold since 1964, a study has shown.

This has contributed to a loss of life on multiple occasions. A smaller flood hit the Bhotekoshi River in July 2025 and in 2015, the Langtang Lirung mountain was hit by an earthquake-induced avalanche that destroyed Langtang village.

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