A glacial collapse triggered a massive flash flood on Wednesday in the Himalayan border areas of Nepal and adjoining Tibet, killing at least 270 people, with authorities fearing more casualties.

NEW DELHI — A deadly flash flood near Nepal's border with Tibet on Wednesday may have been triggered when the lower part of a glacier broke off and...

The deadly flash floods that tore through Nepal’s Himalayan border region on Wednesday may have been triggered by a massive chunk of glacier breaking away high in the mountains…