Heavy rain in Sichuan, Guizhou and Yunnan provinces will further raise water levels downstream, especially in the coastal manufacturing powerhouse of Guangdong, Xinhua says. Most of those areas are expected to receive more heavy rain over the next 10 days.
Just to the south, communities with tens of thousands of people were threatened by the swollen Xijiang River in the Guangxi region, where a 130-foot crack had opened in an embankment near Changzhou, Xinhua said.
Nearly 120,000 people fled to high ground in the nearby town of Longhua when river water began to pour through the gap, it said.
"If the crack widened and the dike collapsed, the flood would directly threaten the safety" of the city of Wuzhou on Guangxi's border with Guangdong, Zhang Jinshen, a regional flood control official, was quoted as saying by Xinhua.