At 18:30 on July 16, the meteorological observatory of Mangkang County, Xizang, issued a blue warning signal for heavy rainfall: it is expected that there will be light to moderate rain in most of Mangkang County from 20:00 on July 16 to 20:00 on July 17, and moderate to heavy rain (17~37.9 mm) in the north central towns such as Jubalong Township, Luoni Township, Angdo Township, Gebo Township, Zongxi Township, etc. During the process, strong convective weather such as lightning, strong winds, hail, and short-term heavy precipitation are 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, geological disasters, and urban and rural waterlogging that may be caused by heavy precipitation. 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.