解码北京强降雨：有何特点？成因何在？如何防范？

Key Points - The recent heavy rainfall in Beijing has lasted for 7 days, with a total duration of 147 hours, surpassing previous extreme rainfall events [2] - The average rainfall across Beijing during this period was 210.4 millimeters, with the highest recorded in the Miyun District at 366.6 millimeters [2] - Rainfall distribution was uneven, with maximum recorded rainfall of 573.5 millimeters in Langfangyu Station, Miyun District [2] - The rainfall is characterized as extreme convective weather, with hourly rainfall exceeding 80 millimeters in several districts [2] - The formation of this rainfall is attributed to the influence of the subtropical high-pressure system and the interaction with cold air masses [3] - The rainfall can be divided into two periods, with the first influenced by subtropical high pressure and the second by a high-altitude trough and typhoon moisture [3] - As of July 29, the heavy rainfall cloud system has moved out of Beijing, but scattered thunderstorms are still expected [5] - The water inflow to Miyun Reservoir has significantly increased, reaching 7.3 billion cubic meters, leading to the reservoir operating above flood control levels [5][6] - Public safety measures are advised, including avoiding mountainous areas and being cautious around rivers due to risks of secondary disasters [5][8] - Health precautions are recommended, such as ensuring drinking water hygiene and avoiding contact with rainwater to prevent skin diseases [8]