Massive flash floods in Nepal killed at least 22 people on Wednesday and left hundreds of tourists, workers and others missing. Officials said the Bhotekoshi River flooded around 9 a.m. local time, destroying villages, roads and hydropower projects. Nepal asked India and China for rescue help, while officials warned residents to stay away from several rivers. Climate researchers said an avalanche from a glacier likely triggered the flood.

Mud covers houses and a road following a flash flood at Trishuli in Nuwakot district, Nepal, Wednesday. Reuters-Yonhap

UDIN DHUNGA, Nepal — Massive flash floods in Nepal on Wednesday killed at least 22 people and left hundreds of tourists, workers and others missing while causing widespread damage to villages and infrastructure.

Officials said 384 tourists, including 291 from countries such as India, the United States, the United Kingdom and Malaysia, were reported missing.

The Bhotekoshi River flooded around 9 a.m. local time Wednesday, destroying several villages, roads and hydropower projects, officials said.