四川陕西连续降雨具有极端性 南方持久高温即将缓解

Summary of Key Points Core Viewpoint - The upcoming weather forecast indicates significant rainfall in northeastern Sichuan and southern Shaanxi, with potential for extreme weather events and secondary disasters due to prolonged rainfall lasting until September 22 [1][5]. Group 1: Rainfall and Weather Conditions - Strong rainfall has been observed in various regions, including the Sichuan Basin and parts of the Yellow River Huaihe area, with some areas experiencing heavy to extreme rainfall [2][5]. - The Central Meteorological Observatory predicts continued heavy rainfall in northeastern Sichuan and southern Shaanxi, with some areas likely to see heavy or extreme rainfall [2][3]. - Rainfall is expected to persist in the northeastern Sichuan and southern Shaanxi regions, with cumulative rainfall exhibiting extreme characteristics [5]. Group 2: Temperature Changes - A significant drop in temperatures is anticipated in northern regions, with maximum temperatures falling below 20°C for the first time this year [8]. - The cold air mass is expected to bring a temperature decrease of 4 to 6°C across many areas, with localized drops exceeding 8°C [8]. - Southern regions will see a relief from prolonged high temperatures, with the heat gradually receding southward and expected to diminish significantly by September 19-20 [8].