The National Meteorological Center on Wednesday renewed a warning for torrential rains that have unnerved southerners for the past month, prompting authorities to deploy tens of thousands of responders.

According to the center's latest alert for heavy rains, the new round of precipitation is forecast to batter the provinces of Guizhou, Sichuan, Yunnan, Fujian and Zhejiang, as well as Chongqing municipality and the Guangxi Zhuang autonomous region, from July 1 to 2.

In the affected regions, rainfall could reach 100 to 150 millimeters, raising risks for torrential floods and other geological disasters, the alert said.

The alert, which the center has issued for 30 consecutive days, came after marathon-like downpours caused tens of billions of yuan in economic damage over the past few weeks.