A catastrophic debris flow triggered by a glacier collapse struck the Nepal-Tibet border region on August 26, killing hundreds and leaving more than 2,400 people missing in one of the deadliest Himalayan disasters in recent memory.
At least 579 deaths have been confirmed in Nepal with an additional 7 in the Tibet Autonomous Region of China, according to Wikipedia's compilation of official figures. More than 2,478 people remain missing across both regions.
The Bhotekoshi flood — named after the river that runs along the border — was triggered by the collapse of a glacier high in the mountains. Satellite images shared by Al Jazeera and other outlets show the moment the flood destroyed the bridge between Nepal and Tibet, with streets rapidly flooding as debris and water surged through narrow mountain valleys.
The disaster struck at approximately 5:00 AM local time, catching many residents as they slept. Cell phone footage captured the terrifying moment when the floodwaters hit settlements along the river, sweeping away buildings and infrastructure.
Scientists at the U.S. Geological Survey and other institutions have linked the glacier collapse to accelerating glacial melt in the Himalayas, driven by climate change. The region has experienced above-average temperatures throughout 2026, with the ongoing El Niño event compounding the effects of long-term warming.
The floods come just days after record-breaking ocean temperatures were recorded globally, highlighting the interconnected nature of climate systems. Rescue operations continue across the affected regions, with Nepal's military and international aid organizations mobilizing to reach remote mountain communities.
The event underscores growing concerns about glacial lake outburst floods (GLOFs) and debris flows in high-mountain regions, where retreating glaciers leave behind unstable formations that can collapse without warning.
