Rescue teams searched Thursday for hundreds of missing people along the Nepal-China border, where a deadly torrent of water and mud several stories high swept through communities a day earlier following a glacier collapse.

Massive flooding near the border with Tibet killed at least 19 people in Nepal on Wednesday, but hundreds of tourists were still out of contact hours after the disaster hit.

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…