Study Links Climate Change to Deadly Glacier Collapse in Nepal and Tibet
A new scientific analysis suggests that climate change likely destabilized the glacier responsible for catastrophic floods in August 2026, which killed over 1,300 people. Researchers from World Weather Attribution and Imperial College London identified unusually warm conditions as a key factor weakening the permafrost and ice structure.
The first comprehensive scientific study of the disaster that struck Nepal and Tibet in late August has concluded that climate breakdown probably weakened the glacier whose collapse triggered catastrophic flooding. The research, conducted by World Weather Attribution (WWA) and Imperial College London, highlights how rising temperatures contributed to the instability of the ice mass on Langtang Lirung mountain.
On August 26, 2026, a massive section of overhanging glacier and rock, measuring roughly 200,000 square metres, fell from the mountain. This collapse sent an avalanche of 110 million cubic metres of snow and ice into the valley below. The falling debris dropped approximately 1,400 metres, registering as an earthquake, and sparked a freezing flood that moved at speeds exceeding 110 mph. The devastation was severe: more than 1,300 people were killed, and over 5,000 remain missing. Families, homes, settlements, roads, bridges, and other infrastructure were swept away, leaving survivors stranded and cut off.
Researchers identified unusually warm conditions as critical factors in the event. July and August 2026 were the warmest on record locally, with temperatures reaching 5C above the 30-year average in the days immediately preceding the collapse. The study notes that climate breakdown has caused about 2C of warming since pre-industrial times in the region where the collapse occurred. Additionally, the freezing threshold in the Himalayas has risen by about 100 metres per decade since the 1980s, further compromising the stability of high-altitude glaciers.
While the study does not attribute the disaster solely to climate change, it identifies it as a major destabilizing factor alongside geological events. A 7.8 magnitude earthquake in 2015 is noted as having contributed to slope failure, though its specific contribution to the August 2026 disaster could not be confirmed. Experts estimate that an event of this size occurs only once every 1,000 to 10,000 years.
Dr Friederike Otto, a climate science professor at Imperial College London who carried out the study, emphasized the role of temperature anomalies in weakening the permafrost and glacier structure. The findings underscore the limits of adaptation already being reached in vulnerable regions. In response to the destruction, Nepal has filed a formal request with the UN loss and damage fund for financial support to address the substantial cost of recovery.