Disaster official Tran Van Nham of Yen Bai province said Friday that authorities have recovered the body of a 20-year-old man and are searching for three people who were swept away by flash flooding while walking across a stream Thursday.

In the northern port city of Hai Phong, a woman was killed Thursday by a falling tree, another person died when a house collapsed and four others were killed when they were struck by lightning, according to a statement from the Hai Phong Department for Flood and Storm Control.

It said the whirlwinds injured 60 people, and high winds destroyed or damaged more than 900 homes.