A motorist wades through flood after heavy rain brought by Typhoon Son Tinh in Hanoi, capital of Vietnam, July 21, 2018. (Xinhua/VNA)

Cars move through flood after heavy rain brought by Typhoon Son Tinh in Hanoi, capital of Vietnam, July 21, 2018. (Xinhua/VNA)

People wade through flood after heavy rain brought by Typhoon Son Tinh in Hanoi, capital of Vietnam, July 21, 2018. (Xinhua/VNA)

A car and a motorist move through flood after heavy rain brought by Typhoon Son Tinh in Hanoi, capital of Vietnam, July 21, 2018. (Xinhua/VNA)