Rescuers are searching devastated Himalayan valleys while authorities monitor an upstream lake that could bring another surge of floodwater.
KATHMANDU, Nepal — At least 472 people have died and more than 1,500 remain missing after a glacier collapse unleashed a powerful flood across the Nepal-China border region, destroying communities and leaving rescue crews searching through mud and debris.
The latest figures include 469 confirmed deaths in Nepal and three in China’s Tibet region. Nepal’s disaster management authority said Friday morning that 977 people were missing on the Nepali side, while Chinese authorities had reported 558 missing in Gyirong County. Together, those figures put the number of people still unaccounted for at 1,535. Officials cautioned that casualty and missing-person totals could change as rescue teams reach isolated areas and agencies compare separate lists of residents, workers, tourists and pilgrims.
The disaster began Wednesday morning, Aug. 26, when a large mass of glacial ice and rock collapsed high in the Himalayas. The U.S. Geological Survey said its analysis points to a source on a glaciated mountain cliff on the north side of Langtang Lirung in Nepal’s Langtang National Park, near the Chinese border. The collapse generated powerful seismic signals that were initially interpreted as an earthquake. Scientists later determined that the signals came from the enormous movement of ice and rock and the debris flow that followed.
The resulting surge moved through the Bhote Koshi and Trishuli river systems and affected communities nearly 100 kilometers, or about 62 miles, downstream, according to the USGS. Mud, rocks and floodwater damaged or destroyed houses, roads, bridges, markets, hydropower facilities and other infrastructure. Gyirong Port, a major border crossing between Nepal and Tibet, was among the areas hit. Damage to transportation and communications has complicated efforts to reach some mountain settlements and determine how many people were there when the flood arrived.
Nepal has deployed soldiers, police and Armed Police Force personnel for search, rescue and evacuation operations. Authorities said 3,253 people had been rescued by helicopter by Friday morning, while more than 150 injured people had been taken to hospitals in Kathmandu and the badly affected districts of Rasuwa, Nuwakot and Dhading. Helicopters and ground crews have been searching riverbanks, damaged communities and areas covered by debris as teams work to locate people who have not been heard from since the disaster.
The missing include hundreds of foreign nationals who were in the Himalayan region for work, trekking or religious travel. Authorities said people from more than 30 countries remained unaccounted for. India said 288 of its citizens could not be contacted, while the U.S. State Department reported about 90 Americans unaccounted for across Nepal and China. Authorities have also reported missing travelers from Britain, Australia, Canada, Malaysia, Ukraine, South Korea and several European countries. Some were traveling toward Mount Kailash in Tibet, a major pilgrimage destination.
Nepal’s government has established an emergency response operation to coordinate search efforts, verify information and help foreign governments seeking information about their citizens. The Ministry of Foreign Affairs said Thursday evening that Nepal’s security agencies, disaster officials, local governments and health services were mobilized for evacuations, emergency medical assistance and relief. Earlier official casualty figures were lower, reflecting how quickly the toll has changed as teams recovered more victims and reached areas that had been cut off.
Authorities are also confronting the possibility of another flood. Nepali and Chinese officials warned that debris from the disaster had blocked mountain waterways and created a lake upstream that was overflowing. China’s Ministry of Water Resources said the lake contained about 2 million cubic meters of water and was expected to receive roughly another 3 million cubic meters over three days. Nepal’s army sent personnel to inspect conditions along the Bhote Koshi River as officials monitored downstream communities for signs of renewed flooding.
The disaster has also focused attention on the stability of glaciers and steep mountain slopes across the Himalayas. Scientists say it is too early to directly attribute this specific collapse to climate change. Researchers have, however, documented rapid warming across the Hindu Kush Himalayan region, where changes in glaciers, snow, permafrost and mountain slopes can increase natural hazards. The USGS said its teams were using satellite imagery to map the extent of the debris flow and flooding and to support response and recovery operations.
Search and recovery efforts remain active on both sides of the border as authorities continue trying to reach isolated settlements and account for residents and visitors. Officials are also monitoring unstable waterways and newly formed lakes because of the threat of additional flooding. With more than 1,500 people still listed as missing, authorities said the death toll and other figures are expected to change as the operation continues.
Author note: Last updated August 27, 2026.