A glacier avalanche triggered catastrophic flash flooding along the Nepal-China border, killing at least 98 people and leaving more than 600 others, including dozens of American citizens, unaccounted for in one of the Himalayas' deadliest disasters in recent memory.
The wall of water hit Wednesday morning after an ice-rock avalanche from a glacier on the Nepali side collapsed into the Lhende Khola River, blocking its flow and then releasing a massive surge downstream. The Bhotekoshi River flooded around 9 a.m., the Associated Press reported, destroying villages, roads, and hydropower projects across Nepal's Nuwakot and Rasuwa districts. Drone footage showed buildings buried in mud and critical infrastructure wiped out along the border region roughly 60 miles north of Kathmandu.
Nepal's prime minister's office confirmed at least 95 dead on the Nepali side. Across the border in Tibet's Gyirong County, China's state broadcaster CCTV reported at least three more killed and 265 missing. The combined toll of missing persons, 403 in Nepal and 265 in China, exceeds 660 and continues to climb.
Of the 403 people reported missing in Nepal, 341 were foreign nationals, tourists, pilgrims, and workers from at least a dozen countries. Nepal tourism board spokesperson Sunil Sharma said 133 of the missing were Indian nationals on a pilgrimage to Mount Kailash, the sacred Hindu site in Tibet. The New York Post reported that 54 Americans were among the missing, a figure higher than the 47 cited by Sharma through Nepal's tourism board. Thirty-four Australians, 33 Britons, and 24 Canadians were also unaccounted for.
Nine South Korean citizens working on a hydropower plant in the region were missing, South Korean government officials said. Malaysia's foreign ministry confirmed its embassy had lost contact with 11 Malaysians believed to be in Rasuwa district. Russia's embassy in Nepal said four Russian citizens were reportedly in the affected area and could not be reached.
At least 62 missing Nepali citizens had been trekking in the Gosaikunda Lake area of Rasuwa during the Janai Purnima festival. And Nepal police spokesperson Abi Narayan Kafle told the AP that at least 28 police officials were among the missing, a grim indicator of how fast the floodwaters moved and how little warning anyone received.
The International Centre for Integrated Mountain Development, a Kathmandu-based climate research group known as ICIMOD, attributed the disaster to an ice-rock avalanche from a glacier on the Nepal side. The avalanche blocked the Lhende Khola, a tributary of the Bhotekoshi, and when the blockage gave way, a sudden surge of water, mud, and debris roared downstream.
ICIMOD's disaster risk reduction specialist, Saswata Sanyal, said the Lhende Khola had flooded twice in 14 months:
"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."
Water levels on the Trishuli River rose by as much as nine meters, roughly 27 feet, over just half an hour at one point. ICIMOD called the flood wave's speed and magnitude "exceptional." Nepal's government warned residents in several districts to stay away from the banks of the Bhotekoshi, Trishuli, and Narayani rivers.
The U.S. Geological Survey reported a magnitude 4.4 seismic event early Wednesday near the border, approximately 100 kilometers north of Kathmandu. Breitbart noted that experts believe the seismic activity was likely caused by the landslide itself rather than a separate earthquake, a distinction that matters for understanding the disaster's trigger. ICIMOD's preliminary assessment pointed to the rock-ice avalanche as the primary cause, not tectonic activity.
Nepal government spokesperson Sasmit Pokharel confirmed the country had reached out to its two giant neighbors for assistance:
"We have asked both India and China to help us with the rescue efforts."
Indian Prime Minister Narendra Modi spoke with Nepal Prime Minister Balendra Shah and posted on social media pledging support:
"India is prepared to provide Nepal with all possible types of humanitarian assistance. Our teams are closely coordinating on rescue and relief efforts."
Seven Western nations and the European Union, Australia, Britain, the EU, Finland, France, Norway, and Switzerland, issued a joint statement expressing solidarity and encouraging those in affected areas to follow local safety guidance. The U.S. Embassy extended condolences to families of the dead and missing.
But the danger may not be over. ICIMOD warned that a blockage remained lodged upstream on the Nepal-China border river, raising the possibility of a second flood event. Qianggong Zhang, head of climate and environmental risks at ICIMOD, flagged the ongoing threat, a warning that complicates rescue efforts already hampered by destroyed roads and buried infrastructure.
Wednesday's disaster was not the first time this stretch of the Himalayas has been hit. In August of the prior year, similar flash floods struck the same area after a glacial lake in Tibet overflowed due to high temperatures. Nine people died, and critical infrastructure, including a bridge connecting Nepal and China, was damaged.
Researchers in Kathmandu found earlier this year that glaciers across the Hindu Kush Himalaya region are melting at an accelerating rate. Ice loss has doubled since 2000. Sanyal underscored the importance of early-warning systems in what he called "a warming Himalaya", a phrase that, whatever one's view of the broader climate debate, describes a concrete and measurable trend in the region's glacial ice.
The pattern is worth noting plainly: the same river flooded twice in 14 months, each time triggered by glacial instability. Villages, roads, and hydropower projects that were rebuilt or repaired after last year's disaster were hit again. The people living along these rivers, and the foreign tourists passing through, had no effective warning system in place when the water came.
On the ground, the human cost was immediate and personal. Raju Bhadel, a 56-year-old local resident, described the moment he learned what had happened to his family's home.
"I got a call from (my brother-in-law) this morning, and they were crying and said their entire house had been swept away."
Images from Nuwakot district showed buildings slathered in mud. Drone footage captured roads ripped apart and structures buried under debris. Fox News reported that Nepal has faced repeated devastation from floods and landslides, with survivors in past disasters complaining of delayed government assistance even after official pledges of help.
Travel in parts of the affected area was halted entirely. The destruction of roads cut off access to remote communities, and the scale of the missing-persons count, spanning more than a dozen nationalities, suggested the full toll could take days or weeks to establish.
Several critical facts remain unclear. Nepal and China have provided separate casualty and missing-persons figures, but no combined official total has been issued. The status of ongoing rescue operations, whether they are active, suspended, or expanding, has not been specified. No injury figures have been released. And the specific hydropower projects damaged or destroyed along the Bhotekoshi have not been publicly identified.
The 341 foreign nationals listed among Nepal's 403 missing appear to be a subset of that total, but officials have not confirmed whether the counts overlap with figures reported by individual countries. With nationals from the United States, India, Australia, Britain, Canada, South Korea, Malaysia, Russia, and other countries all unaccounted for, the diplomatic and logistical complexity of the search effort is enormous.
When a glacier collapses into the same river twice in just over a year and hundreds of people vanish, the question is not whether anyone saw it coming, it is why no one was ready.
