Skip to content

Study links climate crisis to Nepal‑Tibet glacier collapse that killed 1,300+

scienceSep 17, 202619353

On 26 August a roughly 200,000 square metre section of overhanging glacier and rock on Langtang Lirung collapsed, sending about 110m cubic metres of snow and ice down 1,400 metres and triggering flash floods that killed more than 1,300 people and left over 5,000 missing. A World Weather Attribution study led by Imperial College London found unusually warm conditions had probably weakened the glacier beforehand, with July and August 2026 locally the warmest on record and temperatures reaching about 5C above the 30-year average in the days before the collapse. The study says the region has warmed by about 2C since pre-industrial times and by about 1.5C in July and August specifically, trends that have thinned glaciers and increased meltwater. Researchers also found the freezing threshold in the Himalayas has risen by about 100 metres per decade since the 1980s, thawing permafrost and destabilising mountain slopes. Dr Friederike Otto of Imperial said, “Communities in Nepal are paying with their lives for a crisis driven by fossil fuel emissions thousands of miles away.” The paper describes the disaster as a compound event rather than a single weather trigger and notes rock avalanches of this size are rare, with estimated annual frequencies of one per 1,000, 10,000 years, concluding limits to local adaptation are already being reached. The authors warn that without much faster action to transition to zero fossil fuel emissions similar large-scale collapses and downstream devastation are likely to occur again.

1 source