(YIN HONG)

Local residents make their way through a flooded street in Foshan City, Guangdong Province, on March 31.

Rain and hail had hit south China since March 29, triggering landslides in mountainous areas.

At least 21 people had died and four had been reported missing by April 1, according to the Ministry of Civil Affairs.

More than 1 million people were affected across the six provincial-level regions of Fujian, Jiangxi, Guangdong, Guangxi, Hunan, Guizhou and Chongqing.