At 12:50 on July 3, the Changdu Meteorological Observatory of Xizang issued a blue warning signal for heavy rainfall: light rain is expected in our city from 19:00 on July 3 to 19:00 on July 4, moderate rain (10~24.9 mm) in some places like Uqi, Karo and Jiangda, and heavy rain (25~49.9 mm) in some places like Dingqing and Bianba. During the process, strong convective weather such as thunderstorms, strong winds, hail, and short-term heavy precipitation is prone to occur. Defense measures: 1. It is necessary to strengthen the inspection and elimination of hidden geological hazards, and prevent secondary disasters such as local flash floods, mudslides, and landslides that may be caused by heavy rainfall. 2. Prevent the adverse effects of heavy rainfall on major engineering construction, energy supply, communication facilities, transportation, etc. 3. Pay attention to preventing the adverse effects of severe convective weather on agricultural and animal husbandry production, outdoor activities (construction sites, high-altitude operations), etc., and do a good job in lightning protection safety at cordyceps harvesting sites and temporary residences.