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].

Core Viewpoint - Guangdong province is experiencing high temperatures, but a tropical depression is expected to bring significant rainfall from September 8 to 10, alleviating the heat [1][3]. Weather Forecast - A tropical depression formed in the eastern South China Sea on September 5, moving towards the western coastal areas of Guangdong at a speed of 10 to 15 kilometers per hour, with an expected intensification into the 16th typhoon of the year [3]. - From September 5 to 7, high temperatures and scattered thunderstorms are prevalent across Guangdong, with the southern coastal areas expected to see increased rainfall starting the night of September 7 [3]. - Specific forecasts for September 6 indicate scattered thunderstorms and local heavy rain in southern Pearl River Delta, western Guangdong, Shaoguan, Qingyuan, and Heyuan, with maximum temperatures ranging from 30-37°C [3]. - On September 7, eastern Guangdong and southern Pearl River Delta will experience cloudy to overcast conditions with thunderstorms and local heavy rain, while other areas will have similar weather with maximum temperatures between 30-36°C [4]. - From September 8 to 9, heavy rain to locally extreme heavy rain is expected in the Pearl River Delta and western Guangdong, with eastern Guangdong experiencing heavy rain to rainstorm conditions [4].

Group 1 - The city of Guangzhou is expected to experience heavy rain to torrential rain starting from September 7 due to the influence of a tropical system, which will alleviate high temperatures [1][2] - The Guangzhou Flood Control and Drought Relief Headquarters reported that as of September 4, the average rainfall in the city was 1853.5 mm, which is higher than the normal level of 1653.7 mm for the same period but lower than last year's 2307.6 mm [1] - The city has activated emergency responses 46 times this year, including 41 for heavy rain and flooding, 4 for typhoons, and 1 for flood control [1] Group 2 - The upcoming rainfall is expected to cause significant rises in water levels in small and medium rivers, with changes ranging from 1 meter to 3 meters, and some rivers may approach warning levels [2] - The Pearl River Estuary will experience notable storm surge, coinciding with astronomical tides, which may lead to tidal levels exceeding warning thresholds in certain sections of the Pearl River [2] - From September 9 to 10, Guangzhou will see heavy rain to torrential rain, with a transition to mainly overcast weather starting September 11 [2]

Core Points - Typhoon "Danas" has changed its path from moving north to west, creating a zigzag pattern, and is expected to bring continuous rainfall to regions including Zhejiang, Fujian, Jiangxi, Hunan, and Guangdong [1][2] - The typhoon is predicted to make landfall between Taizhou, Zhejiang, and Ningde, Fujian, with wind speeds reaching 9 to 10 levels (23 to 28 m/s), classified as a tropical storm or strong tropical storm [1] - The Central Meteorological Observatory has issued a blue alert for the typhoon and a yellow alert for heavy rain, forecasting significant rainfall in southeastern Zhejiang and northeastern Fujian [1][2] Weather Impact - The typhoon is expected to maintain its warm structure due to favorable moisture transport conditions, leading to prolonged rainfall in affected areas [2] - High temperatures have been prevalent, with yellow alerts issued for high temperatures across a wide range, including areas in Xinjiang and eastern Fujian potentially exceeding 40°C [2] - The arrival of Typhoon "Danas" is anticipated to gradually alleviate the high temperatures in southern regions [2]