Race to get aid into Nepal and Tibet amid warnings flood lake could burst

International aid groups and rescue teams are racing to deliver emergency relief to flood-stricken regions of Nepal and Tibet as authorities warn that a swelling barrier lake formed by recent torrents is at risk of bursting.

Catastrophic flash floods that thundered down Himalayan valleys on Wednesday have killed at least 469 people and left more than 1,300 missing across Nepal and Tibet. The disaster destroyed entire villages, swept away power plants, and severely damaged crucial infrastructure, including dozens of bridges and 40 kilometers of roads.

Search and rescue operations face major hurdles due to destroyed transport links and cut power lines. In Nepal's Bagmati province, military helicopter teams are working to rescue approximately 100 workers trapped inside a swamped tunnel at the Trishuli 3A hydropower project, where 350 people have already been extracted. Bodies have been recovered hundreds of miles downstream in Nepal's Chitwan district, near the Indian border, while dozens of injured survivors have been evacuated to Kathmandu for medical treatment.

The disaster has affected a significant number of international travelers and pilgrims. Police and tourism officials reported more than 500 foreigners missing in Nepal, including citizens from India, the United States, Britain, Australia, and Canada. Many were traveling along trekking routes or undertaking pilgrimages to Kailash Mansarovar, a high-altitude site in Tibet sacred to Hindus and Buddhists.

The United Nations allocated an initial $2 million in emergency disaster funds to cover medical care, shelter, and clean water. Meanwhile, disaster management authorities in both Nepal and China issued urgent warnings regarding a rising lake created by debris at the confluence of the Tsogyal and Purupqiangzangbu rivers, appealing to locals and rescuers to avoid the area due to potential overflow.

Initial reports suggested an earthquake had triggered the disaster. However, the U.S. Geological Survey clarified that no earthquake took place; instead, a massive collapse of glacial rock and ice generated a seismic shock and released a deadly torrent of debris down the mountain valleys.

Aid organizations warned that affected communities face severe risks without swift intervention. Srijana Gurung, acting Nepal director for Plan International, noted that Himalayan communities are experiencing increasingly intense climate shocks, emphasizing that the immediate priority must be locating missing persons and delivering shelter, clean water, and hygiene supplies to prevent waterborne diseases.

Information from the Tibetan side of the border remains tightly restricted by Chinese authorities. Chinese state media reported three confirmed deaths and at least 558 missing people, including 260 foreign nationals, while focusing coverage on state rescue efforts. Human Rights Watch criticized Beijing's tight control over information and access to the region, urging Chinese authorities to allow independent journalists and researchers to investigate the disaster and evaluate potential risks from rapid state-led development in Tibet.