UDIN DHUNGA, Nepal (AP) — Massive flash floods in a border area of Nepal and China killed at least 160 people and left hundreds of tourists, workers and others missing Wednesday after suddenly sweeping through communities and halting travel in some areas. Experts said a glacial collapse caused the disaster in the warming Himalayan region.
Police in Nepal reported at least 157 dead. China’s state broadcaster CCTV reported at least three dead and 265
missing in the Tibet region’s Gyirong County near the national border. Drone footage showed roads destroyed and buildings buried by thundering water the color of wet cement. State news agency Xinhua reported significant casualties.
The region's steep valleys are economic lifelines and travel corridors but are precarious when disaster strikes. Images showed what appeared to be the second floors of buildings in Nepal's hard-hit Nuwakot district slathered in mud after the torrent rushed by. Debris hung from tree branches and wires, vehicles were buried and some stunned survivors were caked in mud.
There was little time for anyone to flee.
“When I reached Dhunge bazaar, in half an hour, the flood came and damaged all the market. People were preparing to go to office then,” resident Shoyam Rajbhandari said. “How many people are missing or dead, we don’t know.”
Officials in Nepal said 403 people, including 341 foreigners, were reported missing. Sunil Sharma, a tourism board spokesperson, said 133 were from India on pilgrimage to Mount Kailash in Tibet, a sacred site for Hindus. Also missing were 47 from the United States, 34 from Australia, 33 from Britain and 24 from Canada, he said. The State Department said it was aware of Americans affected.
At least 62 missing Nepali citizens were among hundreds of locals trekking in the Gosaikunda Lake area in hard-hit Rasuwa district bordering Tibet’s Gyirong, coinciding with the local festival of Janai Purnima on Friday, Sharma said. Though the current monsoon season is less favorable for trekking in Nepal, it’s a major season for Kailash trekking, which follows the route in Nepal’s Rasuwa district.
Nepal police spokesperson Abi Narayan Kafle told The Associated Press at least 28 police officials were missing.
Officials warned residents in several districts to stay away from the banks of the Trishuli, Bhotekoshi and Narayani rivers. At least 19 bridges and nearly 40 kilometers (25 miles) of road were swept away. The Bhotekoshi flooded around 9 a.m. Wednesday, destroying several villages and hydropower projects, officials said.
“We have asked both India and China to help us with the rescue efforts,” said government spokesperson Sasmit Pokharel.
The U.S. Geological Survey first reported a magnitude 4.4 earthquake early Wednesday, about 66 kilometers (41 miles) north of Kathmandu, near the border. The USGS later updated its analysis to say the seismic event it measured was a 5.2 magnitude glacial collapse that sent debris flowing downstream with catastrophic impact on communities. It said its determination was based on data from nearby seismic stations, long period seismic waves and satellite imagery, and that no earthquake had occurred.
South Korean government officials said nine citizens working on building a hydropower plant in Nepal were among those reported missing. Malaysia’s foreign ministry said travel agencies had lost contact with 11 Malaysians believed to be in Rasuwa district. Russia’s embassy in Nepal said four citizens reportedly in the affected area were missing.
Indian Prime Minister Narendra Modi spoke with Nepal’s Prime Minister Balendra Shah and offered help. “India is prepared to provide Nepal with all possible types of humanitarian assistance. Our teams are closely coordinating on rescue and relief efforts,” Modi said on social media.
Some United Nations bodies were deploying “in an effort to meet what will clearly be massive humanitarian need,” U.N. spokesperson Stephane Dujarric said.
In a joint statement, Australia, Britain, the European Union, Finland, France, Norway and Switzerland expressed solidarity with people in Nepal, adding: “We encourage all those in affected areas to follow the guidance of local authorities and official safety advisories as the situation continues to evolve.”
Climate experts at the Kathmandu-based International Centre for Integrated Mountain Development said an avalanche from a glacier likely caused Wednesday’s flash flood.
“Hydrological observations indicate the exceptional speed and magnitude of the flood wave,” they said in an emailed statement, noting that water levels at one point on the Trishuli river rose by as much as 9 meters (27 feet) over half an hour.
The Lhende Khola River, a tributary of the Bhotekoshi, had maximum flooding, they said.
“The Lhende Khola has flooded twice in 14 months, this time triggered by an ice rock avalanche from a glacier on the Nepal side that blocked the river and released a sudden surge downstream,” said Saswata Sanyal, a disaster risk reduction specialist at the climate research group.
He noted the importance of early warnings in “a warming Himalaya.”
The region saw similar flash floods in August last year, when a glacial lake in Tibet overflowed because of high temperatures. Nine people were killed, and critical infrastructure, including a bridge connecting Nepal and China, was damaged.
The Himalayan mountain range spans several countries in South Asia and has many of the world's highest peaks and remaining glaciers. The steep slopes and the lush valleys below are especially vulnerable to flooding and landslides, and extreme weather events like intense monsoons and melting glaciers have become more common because of warming due to human-caused climate change.
Researchers in Kathmandu found earlier this year that glaciers across the Hindu Kush Himalaya region are melting faster, with ice loss rates doubling since 2000.
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Arasu reported from Bengaluru, India. Associated Press writers Shristi Kafle in Kathmandu, Fu Ting in Washington, Hyung-jin Kim in Seoul, South Korea, and Eileen Ng in Kuala Lumpur, Malaysia, contributed to this report.
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