NUWAKOT - Rescue teams rushed to find hundreds of people missing on the Nepal-Tibet border in flash floods and landslides that killed at least 165 and swept away entire villages.
A terrifying clip of surveillance video from the Chinese side of the frontier shows a massive wall of mud and debris crashing over a building several stories high on Wednesday morning, engulfing it as dozens of people ran for their lives below. The surge swept away buses and cars like they were toys.
Many of the missing are foreign tourists, officials said of the disaster, which the US Geological Survey said was caused by a glacial collapse that sent a flow of debris engulfing areas along the way.
The tsunami-like rumble of water and mud struck villages and towns on the path of two rivers -- Bhote Koshi and Trishuli, with Nepali police saying they had recovered 162 bodies.
READ: Four South Africans among those missing in Nepal floods
Across the border, Chinese state broadcaster said a "mudslide disaster" at the Gyirong Port in Tibet claimed three lives while 265 people were still missing.
Rescuers waded through mud and sludge to look for survivors after floodwaters buried the lower floors of multi-storey buildings.
Some 403 tourists -- 341 of them foreigners -- were unaccounted for several hours after the disaster struck, according to Nepal's tourism ministry.
The missing foreigners included 142 Indians, and others from Australia, Britain, Malaysia, the Netherlands, Portugal, South Africa, South Korea and the United States, the tourism board said.
"Entire villages and market areas have been wiped out," said David Fisher, the Nepal head of the International Federation of Red Cross and Red Crescent Societies (IFRC).
It said it was dispatching emergency supplies including blankets, first aid kits, stretchers and body bags.
Tibet government officials mobilised nearly 800 emergency workers and 150 vehicles as well as sniffer dogs and speed boats to help the rescue efforts, China's state-run news agency Xinhua said.
Monsoon rains from June to September regularly trigger deadly floods and landslides across South Asia.
Scientists say climate change is increasing the frequency and intensity of extreme weather events in the region.
Many trekking companies were not running tours during the monsoon season, but there remains significant numbers of travellers including pilgrims in the region.
Among sites hit by the flood was Syabrubesi, the gateway to the popular trekking areas, as well as by pilgrims travelling to the base of the Mount Kailash, a holy site for Buddhists and Hindus.
Images shared by Nepali police showed floodwater surging through a river, sweeping away houses in its path, while AFP images depicted the top floor of a house sticking out from muddy soil.
Rasuwa, in the north of Nepal, was the first district to be affected. But deaths have been reported from seven Nepali districts in total as the floodwaters raged downstream, all the way to Chitwan in the south, on the border with India.
- AFP