A catastrophic mud and rock wall collapse on the Bhote Koshi River, at the Nepal-Tibet border, triggered a flash flood that swept away homes and left more than 400 people missing, including 33 British citizens and a 13-year-old girl. A local family recalls witnessing the terror firsthand, as rescuers race against time.

Deadly Flash Flood at Nepal-Tibet Border Leaves Over 400 Missing

On Wednesday, August 26, 2026, at approximately 8:30 a.m. local time, a massive wall of water crashed through the border region between Nepal and Tibet, following the collapse of a mud and rock barrier on the Bhote Koshi River, just on the Tibetan side. Local authorities report that the collapse may have been triggered by an earthquake in the area, though official confirmation is still pending.

The flood destroyed homes, severed roads, and disrupted power infrastructure across Nepal's Rasuwa and Nuwakot districts and in Gyirong County, Tibet. Heart-wrenching videos shared on social media show dozens of people scrambling to escape the raging water as it rushed through the valley.

“We heard a loud roar, and the water immediately invaded the immigration office building. There was no time to react,” said Kumar Adhikari, manager of the trekking company Alpine Eco Trek, who has been searching for his guides and their clients.

The Devastating Toll: Over 400 Missing

Nepal’s police have confirmed that 157 bodies have been recovered so far, while more than 400 travelers remain unaccounted for. Among them, the international community is particularly alarmed by a group of 33 British citizens, which includes a 13-year-old girl.

NationalityMissingAdditional Details
British33 (including a 13-year-old girl)Group on a nine-day pilgrimage to Mount Kailash
Irish2No further details
South Korean8 + 10 trappedWorkers at a hydropower plant; 10 still trapped in the area
Other foreignersOver 100 (unconfirmed)Part of the 341 foreign nationals reported missing

The British Group Lost at the Border

The trekking company Alpine Eco Trek reported that four Nepali guides (aged 38, 35, 45, and 29) are also missing. The British group, consisting of 3 men aged 65, 64, and 52 and 7 women aged 44, 47, 51, 60, 63, 63, and 65, was on a nine-day tour to Mount Kailash, a sacred pilgrimage site in Tibet.

According to the company, the group was trapped inside the Tibetan immigration office at the border, and all contact was lost at 8:40 a.m. that Wednesday. Adhikari added, “We had no warning; the water rose in seconds.”

Official Response and Safety Warnings

In Kathmandu, Nepal’s Foreign Minister, Shisir Khanal, briefed parliament on the possible earthquake trigger. In London, the UK Foreign Secretary, Ed Miliband, stated that he is “following the events in Nepal with deep concern” and that officials are working with authorities to assist affected British nationals.

⚠️ Travel Advisory: The Nepali authorities urge extreme caution in the Rasuwa district and in the riverbanks of the Bhote Koshi and Trishuli rivers. Non-essential travel to the region is discouraged, and people are advised to move to higher ground or safe areas immediately.

International Solidarity

Embassies of the United Kingdom, Australia, the European Union, Finland, France, Norway, and Switzerland issued a joint statement of solidarity with the victims and their families, pledging to coordinate rescue and relief efforts.

The full scale of this disaster is still unfolding. Rescue operations continue, and consular services are working to track down all British citizens who have lost contact.

How to Help

For those looking to support relief efforts, organizations such as the Nepal Red Cross Society are providing emergency shelter and medical aid. Donations are being accepted through their official channels, and the UK government has set up an emergency contact line for concerned relatives of the British missing.