The disaster, which the US Geological Survey says was triggered by a collapse of glacial ice in the high Himalayas, sent a massive wall of water and mud roaring down valleys on the Nepal-Tibet border. Terrifying videos from the event showed trucks being upended and houses, roads and power projects swept away in an instant.
Nepalese authorities confirmed that hundreds of people had been rescued from a tunnel where they became trapped as the floodwaters surged. The operation, which involved heavy machinery and teams working through the night, was described as a rare bright spot in an otherwise devastating emergency.
But the scale of the tragedy remains immense. At least 165 bodies have been recovered so far, with officials fearing the final toll could climb significantly as search teams reach more remote villages. Among the missing are nationals from India, the United States, the United Kingdom, Australia and Canada, many of whom were tourists trekking in the popular Himalayan region.
Avalanches and flash floods are common in the Himalayas during the monsoon season, but scientists have warned that glacial lake outburst floods – triggered by melting ice due to rising global temperatures – are becoming more frequent and intense. The collapse that caused this week's deluge is believed to have been a glacial outburst from a high-altitude lake, sending billions of litres of water cascading downstream.
In Tibet, officials said they feared “major casualties” after a mudslide hit a border land crossing. Chinese rescue teams have also been deployed, but access to many areas remains difficult due to damaged roads and ongoing hazards.
The Nepalese government has declared several districts disaster zones and appealed for international assistance. Australia's Department of Foreign Affairs and Trade (DFAT) said it was urgently seeking information about the welfare of Australians reported missing. The Australian High Commission in Kathmandu is working with local authorities.
Survivors described scenes of chaos as the wall of water struck without warning. “We heard a sound like thunder and then everything turned to mud,” one rescued tourist told local media. “People were running, families were separated. It was like a nightmare.”
As the rescue effort continues, attention is turning to the long-term implications – not just for the affected communities, but for the entire Himalayan region, where glacial instability poses a growing threat.