Catastrophic Flood Strikes Nepal-China Border, Killing at Least 98 as Hundreds Remain Missing

A catastrophic flash flood tore through the mountainous border region between Nepal and China on Wednesday, killing at least 98 people and leaving hundreds more missing as rescue crews struggled to reach communities devastated by torrents of water, mud and rock.

Nepal's prime minister's office reported at least 95 deaths, while Chinese state broadcaster CCTV reported three deaths in Tibet's Gyirong County. Chinese authorities also reported 265 people missing in the area, while officials in Nepal said 403 people — including hundreds of foreign nationals — had been reported missing.

The disaster struck communities along the Bhotekoshi river system in northern Nepal and areas near the Chinese-controlled Tibetan border. Floodwaters ripped through settlements, buried vehicles and buildings in mud, destroyed roads and swept away bridges, leaving parts of the region isolated.

Drone footage and images from the disaster zone showed extensive destruction, with roads severed, buildings partially buried and debris scattered across communities along the river.

Among the missing in Nepal were 341 foreign nationals, according to tourism officials cited by The Associated Press. They included 133 Indian nationals traveling on pilgrimage to Mount Kailash in Tibet, as well as travelers from the United States, Australia, Britain and Canada.

Nepali officials also reported dozens of local residents and police personnel missing. Hundreds of people had been traveling through the region during pilgrimages to Mount Kailash and Nepal's Gosaikunda Lake.

The exact trigger of the disaster remained under investigation Wednesday.

A preliminary assessment by Nepal's National Disaster Risk Reduction and Management Authority indicated that an ice-and-rock avalanche may have blocked the Lhende River near the Nepal-China border before releasing a sudden debris-filled surge downstream.

Nepalese officials were also examining whether a magnitude 4.4 earthquake recorded in the region shortly before the flooding could have played a role. The U.S. Geological Survey recorded the earthquake north of Kathmandu near the Tibetan border, but authorities had not established a definitive connection between the quake and the flood.

The flood caused enormous infrastructure damage.

Nepal's Department of Roads said a roughly 42-kilometer road connecting Betrawati in Nuwakot with the Rasuwagadhi border crossing had been damaged, with multiple sections and several concrete bridges washed away.

Authorities were still attempting to determine the extent of destruction closer to the border, where communications and transportation links had been badly disrupted.

Nepal's electricity infrastructure was also hit. The Nepal Electricity Authority said approximately 430 megawatts of generating capacity, including hydropower and solar facilities, had been damaged, disrupting electricity production, transmission and distribution.

Rescue operations were underway on both sides of the border.

Nepal mobilized army personnel, police, disaster-response teams, medical workers and helicopters, while authorities requested assistance from neighboring India and China.

Indian Prime Minister Narendra Modi spoke with Nepalese Prime Minister Balendra Shah and offered assistance following the disaster.

China also launched a major emergency operation around Gyirong. Chinese state media reported that hundreds of rescue personnel, vehicles, search dogs and emergency equipment were being deployed as crews attempted to reach areas where roads and communications had been destroyed.

Chinese President Xi Jinping ordered authorities to make the search for missing people a priority and called for measures to prevent additional casualties from secondary disasters.

The danger was not necessarily over.

Experts warned that material blocking waterways upstream could potentially produce another sudden surge, while continuing rainfall and unstable mountain terrain complicated rescue operations. Authorities urged residents near the Bhotekoshi, Trishuli and Narayani rivers to stay away from riverbanks and move out of vulnerable areas.

The disaster is another devastating blow to a Himalayan region already highly exposed to floods, landslides, avalanches and glacial hazards.

The same broader border region suffered a major flash flood last year that killed people and destroyed critical infrastructure, including a bridge connecting Nepal and China.

Wednesday's catastrophe is considerably larger. With hundreds of people still unaccounted for and rescuers struggling to reach some of the hardest-hit areas, authorities warned that the confirmed death toll could change as search operations continue.

For families waiting for news of missing relatives — and for hundreds of foreign travelers caught in the disaster zone — the search across the Nepal-China frontier remained urgent late Wednesday.