Emergency services are rushing to find survivors and treat the wounded after a devastating flash flood on the border of Nepal and Tibet on Wednesday killed more than 500 people, with over a thousand still missing. But the remote and rugged terrain, as well as the risk of further flooding from upstream lakes formed by piles of debris, make their work as delicate as it is dangerous.
Rescue teams searching for survivors of a deadly flash near the border between Nepal and Tibet were forced to stop their work on Friday after water overran the banks of a lake formed by mountains of debris upstream of the flood zone.
