Core Viewpoint - Southern China is expected to experience a new round of heavy rainfall from May 21 to 24, with the most intense period occurring tomorrow, leading to potential geological disasters and secondary hazards [1][3][5] Summary by Relevant Sections Rainfall Forecast - From May 21 to 24, regions including Anhui, Hubei, Hunan, Jiangxi, and Guangxi will face heavy rain, with some areas experiencing rainfall exceeding 60 mm in 6 hours, and localized areas potentially reaching over 120 mm [1][3] - The rainfall pattern is characterized by a broad range but varying intensity, with some areas experiencing severe downpours [1][5] Weather Conditions - The rainfall will be accompanied by strong convective weather, including thunderstorms and hail, particularly in the eastern Southwest region, Jianghan, Jianghuai, Jiangnan, and northern South China [1][3] - The intensity of rainfall is expected to increase tonight in eastern Sichuan, Chongqing, and northern Guizhou, with potential for heavy rain and localized severe storms [3] Geological and Hydrological Risks - There is a high risk of geological disasters in regions such as northwestern Guangxi, southern Chongqing, and western Zhejiang due to the anticipated heavy rainfall [7] - The overlap of strong rainfall areas with previously saturated regions raises concerns for flash floods and other secondary hazards [5][7]