In the next three days, Guizhou, Hunan, Jiangxi, Guangxi, Guangdong and Fujian are at high risk of rainstorm disasters, and there are thunderstorms, gales, hail and other severe convective weather in the above areas and Yunnan bureau; During the May Day holiday, it is necessary to pay attention to the adverse effects on transportation, urban operation, tourism activities, building facilities, agricultural production, etc., and prevent secondary disasters that may be caused by heavy rainfall weather.