Flash flood kills at least 95, leaves hundreds missing on Nepal-China border

A wall of water, ice and rock debris tore down the Bhotekoshi River early Wednesday from high in the Himalayas along the Nepal-China border, sweeping through Nepal's Rasuwa district and across the frontier into China's Gyirong county. By evening, Nepali authorities had recovered at least 95 bodies and were searching for more than 400 people still unaccounted for, most of them foreign trekkers, pilgrims and hydropower workers who had been along the river's course near the frontier crossing at Rasuwagadhi, according to Nepali officials and the Kathmandu Post. Scientists were still working Wednesday night to determine exactly what triggered the surge.

The toll

Nepal's Prime Minister's Office put the confirmed death toll at 95 as of Wednesday evening, according to the Kathmandu Post, which reported the figure rising through the day as search teams reached more of the affected area. The Nepal Tourism Board said 403 people remained missing, including 341 foreign nationals from more than 25 countries: 133 Indians, many of them pilgrims travelling toward Kailash Mansarovar in Tibet; 47 Americans; 34 Australians; 33 Britons; 24 Canadians; and 11 Malaysians, among others. Also unaccounted for were 85 security personnel — 44 soldiers, 28 police officers and 13 members of the Armed Police Force — along with roughly 60 workers from hydropower construction sites and dozens of bank employees. NPR separately reported that Chinese authorities were still searching for as many as 265 people unaccounted for on the Tibetan side, in Gyirong county, a toll that has not yet been confirmed by Nepali officials and may overlap with travelers counted in both countries' figures.

The flood destroyed 19 motorable bridges, damaged roughly 40 kilometers of roads, swept away nine bank branches and knocked out infrastructure tied to 11 hydropower projects with a combined generating capacity of about 405 megawatts. The customs post, police station and much of the market town of Timure, near the Nepal-China Friendship Bridge, were largely destroyed.

A cause still under investigation

What triggered the flood remains genuinely unsettled, and early accounts have shifted as more data has come in. The U.S. Geological Survey's own catalog classifies a magnitude-5.2 seismic signal recorded near the border Wednesday morning not as a tectonic earthquake but as a landslide — consistent with the sudden mass movement of ice and rock rather than a fault rupture, and centered close to Kodari, on the Nepal side of the border. Nepali scientists cited by the Kathmandu Post said their initial assessment points to an ice avalanche on the Nepal side that blocked the Lhende Khola, a tributary of the Bhotekoshi, before the blockage gave way and sent a surge downstream into the Bhotekoshi and Trishuli river system. Officials cautioned they had not ruled out a contributing glacial lake outburst further upstream and said a fuller determination could take several days; one researcher quoted by the Post said authorities have "not received any official information yet" and that the cause "will become clearer gradually." Satellite data showed no meaningful rainfall in the border area in the days beforehand, ruling out monsoon rain as a cause.

The same stretch of river produced a smaller glacial lake outburst flood in July 2025, killing several people and destroying a hydropower plant — a pattern regional scientists say is becoming more frequent as warming temperatures destabilize glaciers and swell glacial lakes across the Hindu Kush Himalaya. Saswata Sanyal, disaster risk reduction lead at the International Centre for Integrated Mountain Development (ICIMOD), an intergovernmental body headquartered in Kathmandu, said the acceleration of such events is "completely unprecedented" in the region and called for deeper study of what is triggering the cascading hazards.

The broader trend is stark. The United Nations University's Institute for Environment and Human Security, in a recent assessment, found that the average number of glacial lake outburst floods per decade in the Himalayas is now nearly five times higher than before 1950, and that more than 400 potentially dangerous glacial lakes have been identified across the Hindu Kush Himalaya, many of them in territory that straddles national borders. The institute estimates more than 9,000 lives have been lost to such floods in the region historically, citing the 2013 Kedarnath disaster in India and the 2021 Melamchi flood in Nepal as recent precedents. Yet adaptation funding lags far behind the risk: Nepal alone would need roughly $1 billion by 2030 to build out glacial-flood risk-reduction and early-warning systems in its glaciated river basins, the institute has said, and has so far received only about $7 million in international climate finance for that purpose.

Because the border region sits astride Nepal and Chinese-administered Tibet, monitoring stations on neither side gave much warning before the surge reached populated areas — a gap that has repeatedly frustrated disaster planners on both sides of a border that runs through some of the world's most remote high-altitude terrain, complicating efforts to build a shared early-warning network.

Pilgrims, a trade route and riverside towns

The disaster struck a stretch of river that is both a livelihood corridor and a pilgrimage route. Rasuwagadhi, on the Nepal side, and Kerung, on the Tibetan side, form one of the principal crossings used by Hindu and Buddhist pilgrims travelling by road to Kailash Mansarovar, a mountain sacred in multiple traditions. Officials stressed that the government-organized pilgrimage routes through Lipulekh Pass and Nathu La in India continued to operate normally; it was travelers on privately organized tours through the Rasuwagadhi crossing who were caught in the flood zone.

The worst-hit settlements, Timure and Syabrubesi, are also staging towns for trekkers headed into the Langtang region and for laborers working on hydropower schemes along the Trishuli system. Nepal's foreign ministry and India's government were both fielding inquiries from families of missing travelers; Indian officials said more than 100 Indian nationals remained out of contact, cautioning that a communications blackout in the area meant "out of contact" did not necessarily mean lost.

Rescue effort and reaction

Nepal's government mobilized the army, police and Armed Police Force, backed by helicopters and drones, and declared Rasuwa and Nuwakot "disaster-stricken areas" for three months. The Nepal Army said six helicopters, including its own and privately operated aircraft, had rescued 88 people by Wednesday afternoon, though high water was preventing landings in the worst-affected parts of Syabrubesi and Timure. The operation has been slowed by the terrain itself: one helicopter dispatched to Timure was forced to turn back to Kathmandu without landing after the settlement's helipad was washed away, leaving crews with no safe place to touch down, and several flights were grounded or delayed by low cloud over the gorge. Where landings were impossible, army crews lowered baskets to pull people from rooftops and high ground, while a communications blackout across much of Rasuwa — downed phone towers and severed lines — left rescue teams largely unable to confirm the status of many missing people or coordinate directly with survivors on the ground.

Some of the clearest accounts of what happened have come from survivors themselves. Sanjeev Shrestha, a Timure resident who fled uphill into the forest as the water hit, said in a video shared with local media that "about 75 percent of the people here" may have been buried by the flood, describing the town's market and customs yard as completely submerged in mud; he said the flood struck without warning at 8:53 a.m. Tara KC, a police sub-inspector who scrambled up a slope to escape, said in a separate video, still covered in mud, "I survived, I survived — I am alive so far," according to accounts carried by Ratopati.

"The pain and loss you have suffered is not small. But I want to assure you that you are not alone in this difficult time — the state is with you with all its means and resources."

Prime Minister Balendra Shah made the remarks in his first public statement after the flood, pledging that the government would take full responsibility for rescue, treatment, food and shelter for those affected, according to Free Malaysia Today. India's Prime Minister Narendra Modi offered humanitarian assistance and said New Delhi was coordinating rescue efforts with Kathmandu, while China's leadership ordered authorities in Gyirong to intensify search operations on the Tibetan side.

Other governments with citizens unaccounted for also responded. The U.S. Embassy in Kathmandu issued a public alert directing American citizens in Rasuwa, Nuwakot, Dhading, Gorkha, Chitwan and Tanahun to stay away from riverbanks and low-lying ground, move to higher elevation and follow local authorities' instructions, while State Department staff in Washington said they were in contact with the Nepali government. Britain's Foreign, Commonwealth and Development Office said it was "deeply saddened by the loss of life and devastation" and updated its travel guidance for the roughly 33 British nationals reported missing, while Australian officials confirmed at least one Australian citizen was unaccounted for and said they were working with Nepali authorities to establish the whereabouts of others.

The flood also intruded on a regional climate meeting already underway. Lawmakers gathered in Kathmandu for the second Hindu Kush Himalaya Parliamentarians' Meet held a moment of silence for the victims. "The decisions we make, or do not make, today will affect generations in the future," said Pema Gyamtsho, ICIMOD's director general, in remarks tied to the gathering.

Nepal's disaster authority has since issued a high alert for communities along the Bhotekoshi, Trishuli and Narayani rivers, urging residents in Rasuwa, Dhading, Nuwakot, Gorkha, Chitwan and Tanahun districts to move away from riverbanks as debris and swollen water continue moving downstream, according to a notice from the National Disaster Risk Reduction and Management Authority. The United Nations' humanitarian office in Nepal was tracking the response and coordinating with the government on possible international support needs. With communications still down in parts of the border area and the search for hundreds of missing people ongoing, officials cautioned that both the death toll and the list of those unaccounted for were likely to change in the coming days.