A catastrophic flash flood triggered by a massive glacier collapse has killed at least 469 people across the Nepal-Tibet border region, with more than 1,300 still missing as of Friday. According to Nepal police, the death toll has climbed significantly from initial reports, while Chinese authorities reported at least three deaths and 558 missing in Gyirong county on the Tibetan side. A large section of glacier broke away high above the Lhende river in Tibet at approximately 8:40 a.m. local time on Wednesday, triggering the deluge that swept across Rasuwa district north of Kathmandu. Officials fear the toll will continue rising as search and rescue operations proceed across the mountainous border region.
The surge struck around 9:00 a.m. on Wednesday, with a huge wall of mud and rock collapsing into the Bhote Koshi River and triggering the catastrophic flood that inundated Syapru Besi and Timure before reaching Galchhi in Dhading by Wednesday afternoon. The surge then moved downstream into the Trishuli River toward Nuwakot. Entire villages and markets were destroyed in the disaster. The flood destroyed a hydropower dam and caused extensive infrastructure damage, with a 42-kilometre road linking Betrawati in Nuwakot with the Rasuwagadhi border crossing washed away, severing Nepal's main trading route with China.
Among those unaccounted for are significant numbers of foreign tourists and pilgrims. More than 500 foreign citizens were among those missing in Nepal, with 177 from India, 90 from the United States, 39 from Australia, 33 from the United Kingdom and 25 from Canada. Chinese state media reported that at least 260 of the 558 missing people in Tibet were foreign nationals. At least 28 Nepal police officials are also missing. The destruction of dozens of bridges and nearly 40 kilometres of roads has complicated search efforts across the region, which is popular with trekkers and pilgrims.
What caused the flood?
Officials initially attributed the flood to melting snow that had accumulated in the Bhote Koshi river, which flows from Tibet into Nepal. However, hydrological experts suspected a glacial lake outburst flood in Tibet rather than local rainfall, suggesting the water surge originated from a sudden release of meltwater across the border. Nepalese foreign minister Shishir Khanal said an earthquake likely triggered a landslide, which in turn blocked a river, sending water gushing downstream. Nepal's disaster authority said satellite data indicated a "snow-rock landslide" on the Nepal-China border may have caused the flood. The US Geological Survey initially reported a magnitude-4.4 earthquake early on Wednesday, approximately 66 kilometres north of Kathmandu near the border, but later updated its assessment to classify the shaking as a 5.2-magnitude landslide event. However, new analysis from the US Geological Survey indicated there was no earthquake before the flood, suggesting the glacier collapse occurred independently.
Which areas have been affected?
Around a dozen settlements across multiple districts face severe damage. Affected communities include Syaphrubesi, Betrawati, Mailung, Salletar, Shantibazar, Pairebesi, Khalti Basti, Sole, Trishuli and Battar. Rescue teams found bodies in Nepal's Chitwan district, hundreds of kilometres downstream from the hardest-hit areas. According to the Red Cross, approximately 93,000 people may have been affected by the disaster. Nepal deployed helicopters for rescue operations after the flood damaged roads, bridges and energy facilities near the Tibetan border. The Nepalese army had rescued more than 100 people by helicopter, with army teams also evacuating people trapped inside facilities linked to the Trishuli hydropower project. Dozens of injured people were transported to Kathmandu for medical care.
What is the current alert status?
Five districts remain on high alert following the disaster. Nepal's disaster management authority has urged residents living near river banks in vulnerable areas to remain vigilant and take immediate precautions. High-risk advisories cover Rasuwa, Nuwakot, Dhading, Gorkha and Chitwan. Experts have warned that a lingering blockage upstream on the Nepal-China border river could produce a second flood. Chinese authorities have warned that an artificial lake formed after the catastrophic flood faces a "high risk of breaching and sending flood waters downstream." According to reports from Friday, inflows into the lake could reach about 3 million cubic metres over the following three days amid continued rainfall, increasing the risk of a breach that could send flood waters downstream and potentially cause further damage in areas including Gyirong Port.
What response has been mobilised?
Work has started to take necessary steps in coordination with the medical team, scouts, and Red Cross,Prime Minister Balendra Shah announced in a social media post following an emergency meeting to assess the situation.
More than 5,000 Nepalese army and police personnel were involved in searches and relief work across the affected region. The International Federation of Red Cross and Red Crescent Societies said entire villages and markets were "wiped out" and dispatched emergency supplies including blankets, first aid kits, stretchers and body bags. The Nepal Red Cross Society has shifted its focus from rescue to large-scale relief operations in the flood-hit districts. Tibet government officials mobilised nearly 800 emergency workers and 150 vehicles as well as sniffer dogs and speed boats to help the rescue efforts, according to China's official Xinhua news agency. China's premier, Li Qiang, arrived in Gyirong on Thursday to direct rescue efforts, alongside 500 military and paramilitary personnel. United Nations chief António Guterres said UN teams and partners were mobilising supplies and personnel in Nepal to support affected communities. UN humanitarian chief Tom Fletcher said he ordered the release of $2 million from the UN's central emergency response fund to help with medical care, shelter and water. The Red Cross launched an emergency appeal for $31 million to respond to the disaster. US president Donald Trump said the flooding was terrible to see, describing how "strong, well-built buildings were wiped out like they were toothpicks." Chinese leader Xi Jinping said "the most urgent task is doing everything possible to search for and rescue the missing people," according to Chinese state broadcaster CCTV.
How does this compare to previous disasters?
Rasuwa, which sits along Nepal's critical trading corridor with China, experienced devastating flooding in 2025 when a glacier burst on the Chinese side of the border. That disaster killed 18 people and caused widespread damage. Officials have now indicated that Wednesday's flood significantly exceeds the scale of the 2025 catastrophe, suggesting this event ranks among the most severe natural disasters to strike the region in recent years.
What happens next?
Rescue and recovery operations are continuing, with the death toll and missing-person counts still being updated. Authorities have warned of renewed flooding risks from the debris-clogged barrier lake upstream, with the potential for a second major flood within three days if the artificial lake breaches. Flood warnings remain in place for downstream districts as river levels are projected to rise further. Authorities are working to move families in flood-risk areas to safety as the situation develops.
Key Facts
- A massive glacier collapse triggered catastrophic flooding in Rasuwa district early on Wednesday around 8:40 a.m., destroying villages, a hydropower dam and critical infrastructure
- At least 469 people killed with more than 1,300 missing across Nepal and Tibet; more than 500 foreign citizens unaccounted for
- A 42-kilometre road connecting Nepal to its China border crossing was washed away, severing the main trading route
- Five districts placed on high alert: Rasuwa, Nuwakot, Dhading, Gorkha and Chitwan
- A newly formed barrier lake upstream faces high risk of breaching within three days, potentially triggering a second flood
