Devastating Nepal floods were triggered by glacier collapse, experts say — and there's a risk of more landslides to come

Waters rise around a building.

Devastating flash floods near the Nepal-Tibet border have left more than 330 people dead and more than 1,500 missing — including 65 from the U.S. — following a glacier collapse early Wednesday morning (Aug. 26), according to Nepalese authorities and Chinese state media.

Data from a surviving water level gauge shows that the Trishuli River water level surged by 30 feet (9 meters) in just 30 minutes on Wednesday in the municipality of Galchhi, some 20 miles (33 kilometers) west of the Nepalese capital, Kathmandu, the International Centre for Integrated Mountain Development reported.