A glacier collapse on Wednesday unleashed a huge torrent of rock, ice, mud, and debris through Himalayan mountain river systems, killing more than 600 people in Nepal and China's Tibet.

Massive flash floods in a border area of Nepal and China on Wednesday killed at least 98 people and left hundreds of tourists, workers and others missing after sweeping through…

Global warming is making high-altitude regions unstable, and could trigger more frequent landslides and floods.