TRISHULI, Nepal — The death toll from catastrophic flash floods near the Nepal-Tibet border has risen to at least 270, as rescue workers search for nearly 1,500 people missing across Nepal and China’s Tibet Autonomous Region after a collapse of mud and rock triggered a destructive surge through Himalayan valleys.
Nepal Police said Thursday that 270 bodies had been recovered in the country, a sharp increase from the initial toll reported a day earlier. Officials warned that the number was likely to climb as search teams reached isolated communities, cleared debris and recovered victims carried downstream by the floodwaters.
Nearly 1,500 people were reported missing across the two countries, including more than 700 foreign nationals, according to Nepalese authorities and Chinese state broadcaster CCTV.
The disaster struck Wednesday when a mass of mud and rock collapsed into a Himalayan river near the border, setting off flash floods that swept through towns, villages, roads and tourist routes in Nepal’s Rasuwa and Nuwakot districts and in Tibet’s Gyirong County.
The surge destroyed homes, bridges, highways, and energy infrastructure, while cutting communications and isolating communities in one of the most remote parts of the Himalayas.
“This will go up, as we have resumed the search and more bodies are expected to be recovered,” Nepal Police spokesperson Abi Narayan Kafle told Reuters.
Death toll climbs rapidly
The scale of the disaster became clearer Thursday as rescue teams moved into areas that had been inaccessible during the first hours after the flood.
Nepal’s police said the death toll had reached 270, while the country’s National Disaster Risk Reduction and Management Authority reported 826 people still missing in Nepal. Nearly 600 of those missing were foreign nationals, according to Deutsche Welle.
On the Tibetan side of the border, authorities reported at least three deaths and 558 people missing in Gyirong County. Of those missing in Tibet, 260 were foreign nationals, CCTV said.
The combined number of missing people remains uncertain. Reuters reported that almost 1,500 people were unaccounted for across Nepal and Tibet, including nearly 750 foreigners.
Differences in official totals are common in the early stages of a large disaster. Authorities must compare reports from families, hotels, tour operators, border crossings, pilgrimage groups, local governments, and emergency crews. Communications failures and blocked roads make that process slower.
Some of those listed as missing may be safe but unable to reach relatives or officials. Others may be stranded in villages cut off by landslides and destroyed bridges. But the size of the missing-person list has raised fears that the final death toll could be much higher.
Nepalese authorities said they expected to keep revising the numbers as waters recede and teams gain access to the hardest-hit areas.
Foreign tourists among the missing
The disaster struck a region frequented by foreign tourists, trekkers and pilgrims traveling toward Mount Kailash and Lake Manasarovar in Tibet.
In Nepal, nearly 500 foreign nationals were among the 826 people reported missing, according to police and tourism officials cited by Reuters.
Earlier assessments listed at least 177 Indian nationals as missing, many of them on pilgrimage to the sacred Kailash Mansarovar site. Other missing people included 63 Americans, 53 Ukrainians, 34 Australians, 33 British citizens, 28 Malaysians and 25 Canadians, Reuters reported. Citizens of about 20 other countries were also reported missing.
The Nepal Tourism Board’s accounting changed throughout the day as officials received new information. CBS News reported that at least 65 Americans were among those still missing in Nepal by Thursday morning, up from 47 Americans reported missing the previous day.
The change does not necessarily mean that additional Americans were swept away. It may instead reflect a more complete count from tour operators, hotels, and local officials. But it illustrates the challenge of tracking people in a fast-moving disaster zone.
Foreign embassies and consulates are likely to rely on Nepalese authorities, tour companies, and family reports to identify missing nationals. For relatives abroad, uncertainty may last days as search teams move through areas where roads and phone networks have been destroyed.
Nine South Korean nationals working at a hydropower plant were also reported missing.
The area’s mix of tourists, pilgrims, local residents, construction workers and government personnel has made the search especially complex.
A wall of mud and rock
The disaster was triggered when a massive amount of mud and rock collapsed into a Himalayan river, sending destructive floodwaters through nearby valleys.
Reuters described a wall of mud and rock collapsing into the river, causing catastrophic flooding in towns and settlements downstream.
The exact mechanism is still under investigation. Experts are examining whether an avalanche, landslide, glacial collapse or glacial-lake outburst played a role.
The Himalayas are highly vulnerable to sudden flood events because steep slopes, melting glaciers, intense monsoon rains and unstable terrain can combine to create catastrophic surges.
A landslide or avalanche can block a river, creating a temporary natural dam. When that barrier breaks, water, sediment, trees, and boulders can be released downstream with extreme force.
Scientists will need satellite imagery, field observations, and hydrological data to determine what happened in this case.
The disaster came during the monsoon season, when heavy rain already makes Nepal’s mountain roads, rivers and slopes more dangerous.
But the scale and speed of the flooding have renewed concern about the effect of climate change in the Himalayas, where warming temperatures have accelerated glacier melting and increased the size and number of glacial lakes.
Climate scientists caution that an individual flood cannot be attributed to climate change without a detailed assessment. Still, the region’s growing exposure to extreme weather and glacial hazards is well established.
Search operations expand
More than 5,000 army and police personnel were mobilized to search for survivors, Reuters reported. By Thursday, rescue teams had saved 125 people, including 20 foreigners.
Rescue work has been complicated by high water, mudslides, debris, and damaged roads.
In some places, helicopters were unable to land because of weather conditions or unstable terrain. Ground teams had to travel through blocked roads and river valleys filled with mud, rocks, and destroyed structures.
Officials said the flood swept away homes, roads and power projects. The damage has cut off communities and slowed efforts to bring food, medical assistance and communications equipment to survivors.
In Tibet, authorities said two villagers had been rescued in Gyirong County, where roads, power links and communications were damaged.
Nepalese rescue workers are focusing on Rasuwa and Nuwakot, the districts hardest hit by the flood. The region is northwest of Kathmandu and includes routes used by travelers heading to trekking areas, border crossings, and pilgrimage sites.
The Nepal Army, police, local volunteers and disaster-response teams are likely to face a prolonged operation. In mountain floods, victims can be buried under debris, trapped in collapsed structures, or carried long distances downstream.
With rain expected to continue in parts of the region, rescuers must also guard against secondary landslides and additional flooding.
Infrastructure losses widen crisis
The floods have damaged a crucial part of the Nepal-China transport corridor.
The affected area includes routes leading to Gyirong Port, a key land crossing between Nepal and Tibet. The crossing serves traders, freight carriers, tourists, and pilgrims. Damage there could disrupt cross-border commerce and travel well beyond the immediate disaster zone.
Nepalese officials previously said that major roads and bridges were washed away. The destruction has isolated villages, delayed rescue operations, and made the delivery of heavy equipment difficult.
Hydropower infrastructure was also affected. The loss of energy facilities could add to the economic damage and complicate recovery, especially in communities dependent on local electricity networks.
The disruption will also affect Nepal’s tourism sector. Rasuwa District sits near popular trekking routes and provides access to Langtang National Park. Tourism is a major source of income for local communities, and the sudden loss of visitors, roads and lodging infrastructure may have effects long after immediate rescue operations end.
Pilgrimage travel toward Mount Kailash may also be disrupted for an extended period.
For China, damage in Gyirong County and at the border crossing could affect local communities and the movement of goods between Tibet and Nepal.
The human toll
The disaster has left families searching for relatives across several countries.
In Nepal, local residents have lost homes, farms and businesses. Some may face displacement before monsoon conditions ease.
For families abroad, the missing-person reports have created a second crisis: a struggle for information. In remote Himalayan terrain, phone service and internet access can disappear, and official lists can change rapidly.
The loss of foreign tourists may draw international attention, but the bulk of the human impact will fall on local communities. Residents of river valleys face the long task of identifying the dead, finding the missing, rebuilding homes, and restoring basic services.
The flood also highlights the risks faced by police officers, soldiers, hydropower workers and guides who work in mountain regions during the monsoon.
At least 28 Nepalese police officers were among the initially reported missing, according to earlier accounts.
Their involvement points to the vulnerability of first responders who were stationed or deployed near the flood zone.
A warning for the Himalayas
The flood underscores a wider challenge for Himalayan countries.
Nepal, China, India, Bhutan and Pakistan are all confronting the effects of glacier retreat, more volatile weather and development in narrow mountain valleys.
Communities need roads, hydropower facilities, tourism infrastructure, and trade links. But these investments can place more people and assets in areas exposed to landslides, avalanches and flash floods.
Early-warning systems can save lives, but they require reliable monitoring, functioning communication networks and clear evacuation routes. In remote mountain areas, those conditions are difficult to maintain.
The Nepal-Tibet disaster may lead to new scrutiny of whether warnings were issued, whether evacuation procedures were effective and whether infrastructure had been built with sufficient attention to climate and geological risks.
It will also likely revive calls for greater regional cooperation. Floods and landslides do not stop at borders. Data sharing, satellite monitoring, and cross-border emergency coordination can be crucial when hazards begin in one country and cause destruction in another.
What happens next
The coming days will determine the scale of the disaster.
Rescuers are continuing to search for survivors. Nepal Police expect to recover more bodies as they enter remote areas and debris fields.
Officials will also need to account for the missing, restore access to damaged roads and bridges, provide shelter and medical care, and assess losses to homes, businesses and power facilities.
The confirmed death toll has risen to at least 270. Nearly 1,500 people remain missing across Nepal and Tibet.
Those numbers may continue to change.
For now, the Himalayan communities along the Nepal-Tibet border are confronting a disaster measured not only in lives lost, but in the roads destroyed, homes swept away and families waiting for news from valleys still cut off by mud, water and rock.