Living in the shadow of the world’s ice-capped mountains has always carried risks, but the devastating flood wave on the Nepal-China border this week is an alarm for the millions who live near these peaks

Nepal is a hotspot for glacier melting as the planet heats up, but it’s not yet clear exactly what caused the deadly flood.

Climate change is causing glaciers to retreat and become less stable, upping the odds of catastrophic collapses.

What triggered the catastrophic flash flood at the Nepal-Tibet border? A massive glacier and debris collapse is believed to have sent a sudden surge of water, mud and rocks into…