Researchers have completed the first scientific analysis of a devastating glacier collapse that occurred on 26 August in the Langtang region, killing more than 1,300 people with over 5,000 remaining missing. The study, conducted by Imperial College London and the World Weather Attribution project, determined that unusually warm atmospheric conditions probably contributed to the failure of the glacier on Langtang Lirung mountain.
The collapse released approximately 110 million cubic metres of snow and ice down the mountainside from a glacier face measuring roughly 200,000 square metres. The material fell approximately 1,400 metres before striking the valley floor with sufficient force to register as an earthquake. The impact liquefied ice and generated a freezing flood that traveled downstream at speeds exceeding 110 miles per hour, destroying communities, infrastructure, homes and roads across a wide area.
The research identified multiple climate-related factors that destabilized the glacier. The region experienced approximately 2 degrees Celsius of warming since pre-industrial times, with July and August 2026 recording locally unprecedented temperatures reaching 5 degrees Celsius above the 30-year average in the days preceding the collapse. Permafrost thaw in the Himalayas has risen by about 100 metres per decade since the 1980s, weakening mountain slopes. Additionally, prior glacier recession had removed stabilizing ice from the collapse site, and a 7.8 magnitude earthquake in 2015 contributed to slope instability, though its specific role in the recent disaster could not be confirmed.
The researchers characterized climate change as a destabilizing factor rather than the direct cause of the disaster, noting that the collapse resulted from multiple compounding factors influenced by decades of greenhouse gas emissions. Scientists emphasized that rock avalanches of this magnitude occur roughly once every 1,000 to 10,000 years, suggesting that the event demonstrates adaptation limits are already being reached.
Nepal has filed a formal request with the UN loss and damage fund seeking financial support for recovery efforts. The nation’s government has called on major emitting countries to accept responsibility for the disaster and support vulnerable nations affected by climate impacts.
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