Nepal-Tibet Border Floods Cause Significant Casualties and Damage

Massive landslides and flash floods on the Nepal-Tibet border have resulted in widespread damage, with hundreds reported dead or missing. Search and rescue operations are ongoing. Chinese state media has reported significant casualties, while Nepalese officials anticipate a "huge scale loss." Military teams have been deployed to assist with rescue and evacuation following the flooding that occurred on Wednesday. Nepal's foreign minister initially indicated that an earthquake was reported on the Tibet-Nepal border shortly before the landslide, suggesting it may have triggered the disaster. The United States Geological Survey (USGS) initially classified the event as a magnitude 4.4 earthquake but later confirmed it was a glacial collapse and debris flow that caused catastrophic impacts downstream. USGS stated, "Additional analysis of nearby seismic stations, long period seismic waves, and satellite imagery led to the determination that the seismic event was instead a glacial collapse and debris flow, and that no earthquake had occurred." Earlier, Nepali authorities informed the BBC that a large chunk of ice may have collapsed from a mountain, bringing down rocks and sediments. Climate change is contributing to accelerated glacier melt in the Hindu Kush Himalaya region, and as rescue efforts continue, scientists are investigating the sequence of events. Simon Cook, a senior lecturer in energy environment and security at the University of Dundee, noted that climate change could have an impact. Cook's team detected that the lower part of a glacier in Nepal near the Langtang Lirung peak, approximately 15km (9 miles) west of the flood site, had collapsed. He estimated that the glacier collapsed in a northwesterly direction and then traveled westwards downstream. Cook stated, "Permafrost is partially holding some mountainsides together; this permafrost is warming and thawing and degrading, so you are going to get more landslides." Mike Searle, a professor of Earth sciences at Oxford University, suggested that the glacier could have collapsed "hours or days" before the flooding affected Nepal and Tibet. He explained, "I think the sheer wave of debris suggests there was a landslide first, the water built up, (which) dammed the river, and then it burst in one huge great flood." One possibility is that water from rainfall or melting ice may have destabilized the ground or ice, triggering a chain reaction. Scientists will examine satellite images to determine the landslide's location, whether any glacial lakes suddenly drained, and where the river may have become blocked, as well as data on recent rainfall. The deluge of material affected northern Nepalese towns, including areas frequented by mountaineering tourists and pilgrims. The border is approximately 40 miles (64.4km) north of Nepal's capital, Kathmandu. Footage showed a wall of mud and rock sweeping away buildings, roads, and vehicles, as people fled the fast-moving wave of material in the Nuwakot region. In one video, a towering wall of water and mud was observed rushing down a gorge along the Trishuli River and enveloping the Rasuvagadhi Border checkpoint, a multi-storey building. Severe flooding has been reported along the Bhote Koshi, Trishuli, and Narayani rivers. Deaths have also been reported in villages on the Tibetan side of the border. The International Centre for Integrated Mountain Development (ICIDMOD) has warned that secondary flooding could occur in the coming days due to debris washed into the river systems. ICIDMOD is currently assessing whether the Trishuli River has been temporarily blocked in narrow sections, which could lead to the formation of a landslide dam and a second flooding event. Authorities and scientists are evaluating the size, location, and stability of any potential blockages. The number of people killed or missing is still being determined. Nepali police report at least 332 deaths, with 64 found in downstream areas in the Chitwan district and another 26 in Nawalparasi East. As of Thursday morning, Nepal's National Disaster Risk Reduction and Management Authority reported 826 people missing, including over 529 tourists, with 466 of them being foreigners. China's state broadcaster CCTV reported that the number of missing individuals in the mudslide disaster in Tibet's Gyirong county has risen to 558, including 260 foreign nationals. The Nepal Tourism Board stated that 644 tourists are still missing, including 33 UK nationals. It remains unclear if any of the missing individuals in the Nepali and Chinese figures have been counted twice. The Gyirong border is the main crossing point for tourists and traffic between China and Nepal. Nepal's prime minister expressed that "the entire nation has been left shocked and deeply distressed," and officials will coordinate with China on the response. China's President Xi Jinping called for an "all-out" search effort and promised stronger monitoring and early warning systems to prevent secondary impacts. In neighboring India, Prime Minister Narendra Modi stated that his government is "prepared to provide Nepal with all possible types of humanitarian assistance." UN Secretary General António Guterres expressed sadness over the severe flooding and noted that UN teams and partners are mobilizing supplies and personnel in Nepal to support the government-led response. The US has pledged $500,000 in aid for emergency shelter, water, sanitation, and other relief items for affected communities. Prime Minister Andy Burnham announced that the UK has offered £5 million to assist the Nepalese government and will do "everything we can" to support British nationals in Nepal. Aerial footage shows the flash flood on the Nepal-Tibet border. Tourists from around the world visit Nepal for its mountains and sacred sites. Official figures indicate that at least 291 foreigners are among the missing, including: 288 nationals from India, nearly 100 Chinese nationals, 65 US tourists, 53 Ukrainian nationals, 51 Malaysians, 34 Australians, 33 British nationals, and 24 Canadians. Smaller numbers of travelers from South Korea, South Africa, Portugal, the Netherlands, and New Zealand are also among the missing.