At least 13 people were killed and 13 remained missing after heavy rains caused flash floods, mud-slides and landslides in south China's Hunan, Guizhou, Guangdong provinces and Guangxi Zhuang Autonomous Region.
In Hunan, continuous rain resulted in swollen rivers, landslides and mud-rock flows.
Three people died in Hengshan county, according to the provincial flood control and drought relief headquarters.
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About 530 houses collapsed, and 11,900 people were evacuated, said the headquarters.
In Guangxi, one person was killed by collapsing house in torrential rain, said the regional civil affairs department.
The rains and ensuing disasters also destroyed 754 houses, seriously damaged another 408, ruined 20,200 hectares of crops, forced the evacuation of 5,900 people.
In Jinping County in Guizhou, five people have died and four are still missing, according to the county's information office.
Heavy rain pounded the county from last night until early today, with 202 millimeters of precipitation recorded in some areas.
Traffic, power and telecommunications were all affected and homes destroyed.
Around 10,000 residents of 24 counties in Guizhou have been displaced.
The homes of 125 families have been destroyed and 300 more have been seriously damaged, said a statement from the provincial civil affairs department.
In Guangdong one woman died and three of her group were swept away by a flash flood on Tianchi Mountain, according to the information office of Qujiang District, Shaoguan city.
Nearly 300 rescuers are searching for the missing around the mountain, which experienced heavy torrential rain.