Himalayan flash flood toll reaches 691 across Nepal and Tibet after glacier collapse
A glacial collapse in the Himalayas triggered flash floods that killed at least 691 people across Nepal and Tibet, with thousands still missing as international rescue teams deploy to search flooded valleys and hydropower tunnels.
Glacier collapse and flood surge
Early on Wednesday, 26 August 2026, a large section of a glacier broke away near the Langtang Lirung peak in Nepal's Rasuwa district. The resulting landslide generated a magnitude 5.2 seismic tremor recorded by the United States Geological Survey (USGS). Torrents of water, mud, and river debris swept down the Bhote Koshi river valley at speeds reaching 115 km/h, inundating settlements in northern Nepal and the adjacent Tibetan region of China. By Sunday, 30 August, the combined death toll reached 691, with Nepal's National Disaster Risk Reduction and Management Authority (NDRRMA) confirming 675 fatalities and Chinese authorities reporting at least seven dead in Tibet.
- Glacial detachment near Langtang Lirung causes a magnitude 5.2 tremor and flash floods.
- Nepalese army rescues a German family of four as search operations expand.
- Nepal permits specialist rescue teams from India, China, Australia, and South Korea to enter.
- Combined death toll reaches 691 as ICIMOD issues warnings over secondary flood risks.
Search efforts and trapped workers
Emergency operations have faced difficult conditions created by ongoing monsoon rainfall and deep sediment layers. In Rasuwa district, rescue teams worked to reach over 100 workers trapped inside a hydropower project tunnel beneath 1.5 meters of mud. Nepalese military spokesperson General Raja Ram Basnet described the operational obstacles near the border:
The biggest problem is the deposited mud left behind after the flood wave.
The mud accumulation prevented military helicopters from landing in affected settlements such as Temure, Syabrubesi, and Mailung. Despite the disruption, over 7,500 people have been rescued across Nepal, including a family of four from Germany located on Friday. In southern Nepal's Chitwan district, local authorities retrieved 233 bodies washed tens of kilometres downstream, though official Ganesh Aryal stated that only four had been identified due to rapid decomposition.
Missing persons and foreign casualties
Authorities report that thousands remain unaccounted for across the mountain region. In Nepal, 2,478 people were listed as missing as of Sunday, including 933 hydropower plant workers and 589 foreign nationals. In Tibet, Chinese officials reported 546 missing individuals, including 261 foreign citizens from 23 countries.
- Nepal
- 104 people
- India
- 49 people
- Latvia
- 33 people
- United States
- 18 people
- United Kingdom
- 15 people
Following diplomatic requests, the Nepalese government authorized specialized foreign teams to assist domestic workers with tunnel rescues and DNA testing. Foreign Minister Shisir Khanal detailed the international deployment during a press conference:
A specialised Indian tunnel rescue team has already arrived, and two Chinese search and rescue teams are preparing for deployment.
Secondary hazards and economic costs
Damaged installations along the river system account for more than 12% of Nepal's national electricity generation capacity. Nepal Finance Minister Swarnim Wagle told Reuters that the country will require between $4 billion and $5 billion to reconstruct ruined roads, bridges, and power infrastructure. The United States announced $3.6 million in disaster assistance to supply food for 10,000 households. Meanwhile, the International Centre for Integrated Mountain Development (ICIMOD) warned of secondary flood risks caused by debris potentially blocking the Trishuli river, while the NDRRMA monitored rising water levels along the Bhote Koshi.
