Deadly Nepal flood highlights glacier risks in warming Himalayas: “The new normal”

August 27, 2026 / 2:00 PM EDT / CBS/AP

The deadly flash flood in Nepal on Wednesday was likely caused by a huge chunk of a glacier that broke off and temporarily dammed a river, according to preliminary investigations by scientists. That may have led to the backed-up water surging downstream with enormous force a few hours later, they suggested.

Scientists are still piecing together information from satellite and ground-level data to figure out exactly what happened to cause the flood, which killed hundreds of people and left over a thousand more missing, including foreigners and pilgrims.

The U.S. Geological Survey on Wednesday reported a magnitude 5.2 glacier 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.

"A lower part of a glacier has really come off," said Jakob Steiner, a geoscientist at the University of Graz in Austria who is currently based in Bangladesh. "If you look at the imagery it's like someone cut with a huge knife through the whole lower part and it fell off."

Steiner said a mass of glacial ice dropping from a great height…

Original source: https://www.cbsnews.com/entertainment/