At about 8:40 am local time on Wednesday, a glacier collapse in the Himalayas triggered flash floods and mudslides along the Nepal-Tibet border, killing at least 157 people in Nepal and three in China and leaving nearly 1,500 missing. Officials said the floods occurred without rain, and satellite imagery showed a large section of a glacier breaking away at roughly 5,200 metres and falling about 1,200 metres, creating an ice‑rock avalanche that blocked the Lhende River before the debris dam gave way. In Nepal, police reported recovering 157 bodies, while authorities in Gyirong County, China, said three deaths had been confirmed and 558 people remained missing, including 260 foreign nationals. Rescue efforts involved more than 5,000 Nepalese army and police personnel, helicopters, drones and search dogs, but high water levels and damaged roads hampered access to the most severely impacted areas. Across the border, Chinese state media said deep sediment delayed rescue teams in the Gyirong region, where a still‑dammed lake upstream remains under monitoring for possible additional flooding. International responses included a rescue aircraft from India carrying about 10 tonnes of emergency supplies, a pledge of support from Prime Minister Narendra Modi, emergency funding of 1 million Swiss francs from the International Federation of Red Cross and Red Crescent Societies, a disaster response adviser and $500,000 from the United States, and a statement from Canadian Prime Minister Mark Carney expressing concern. South Korea established a government task force to assist search and rescue operations for its nationals reported missing, while the United Nations deployed personnel to Nepal and said it stood ready to support rescue efforts in Tibet. Scientists are investigating the cause of the glacier collapse, noting that rapid warming and glacial loss in the Himalayas have increased the potential for sudden floods, though a direct link to climate change for this event has not been established. Officials warned that the death toll may rise as rescuers reach inaccessible areas, and the situation remains fluid as rescue operations continue.