Core Viewpoint - The Three Gorges Reservoir experienced its largest flood event of 2025 on September 20, influenced by autumn rains in Southwest China, following a period of significantly reduced water inflow during the main flood season [1] Group 1: Water Inflow and Flood Events - The inflow to the Three Gorges Reservoir began to rise gradually from September 17, culminating in a flood with inflow exceeding 40,000 cubic meters per second on September 20 [1] - During July and August, the total water inflow to the Three Gorges Reservoir was more than 20% lower than the average inflow for the same period since the reservoir's establishment [1] - The recent rainfall events in the upper reaches of the Yangtze River, particularly in the Jialing River and the Three Gorges area, contributed to the increase in inflow [1]

Core Viewpoint - The recent heavy rainfall in regions such as Chongqing, Sichuan, and Shaanxi has led to significant flooding risks, prompting emergency responses from national and local authorities [1][4][13]. Group 1: Weather Forecast and Impact - The Ministry of Water Resources forecasts heavy to torrential rain in western and northern Chongqing, eastern and southern Sichuan, and southern Shaanxi over the next two days [1]. - Major rivers in the upper reaches of the Yangtze River, including the Min, Tuo, Jialing, and Han rivers, are expected to experience significant water level rises, with some smaller rivers potentially exceeding warning levels [3]. Group 2: Emergency Response - The National Flood Control and Drought Relief Headquarters has initiated a Level 4 emergency response for flood control in Chongqing and Shaanxi as of September 17 [4][13]. - The China Meteorological Administration has also activated a Level 3 emergency response for meteorological disasters on the same day [4]. Group 3: Localized Effects - In Gansu, heavy rainfall has triggered mudslides and localized hail, with hailstones reaching a maximum diameter of 6 millimeters, causing significant disruptions to transportation [5]. - In Sichuan, over 37,000 people have been preemptively relocated due to the risk of flooding and landslides, with emergency services actively responding to incidents of trapped individuals [7][9]. - In Shaanxi's Hanzhong, heavy rainfall has caused road disruptions, prompting immediate repair efforts and the successful relocation of at-risk residents prior to the storm [11]. Group 4: Seasonal Weather Patterns - The recent heavy rainfall is part of a unique weather phenomenon known as "West China Autumn Rain," which typically occurs from September to November, with significant interannual variability [14].

Core Insights - The article discusses the onset of the "Huaxi Autumn Rain" in Shaanxi, which began on August 25, 2025, marking an early start to the autumn rain season by 8 days compared to the average [1] - The article highlights the importance of accurate precipitation forecasts provided by Moji Weather to help users adapt to weather changes and enhance their daily lives [1][2] Weather Phenomenon and Impact - Huaxi Autumn Rain is a unique weather phenomenon affecting regions such as Gansu, Shaanxi, and Sichuan, with specific criteria for determining its onset based on rainfall measurements [2] - Continuous rainfall from this phenomenon can alleviate drought conditions and improve soil moisture for winter wheat sowing, but it may also lead to spoilage of mature autumn crops [2] - The article emphasizes the need for precise precipitation forecasts during this period to mitigate risks such as landslides and urban flooding [2][7] Moji Weather's Services - Moji Weather offers a short-term radar precipitation map that provides a 56-hour global high-definition precipitation cloud map, allowing users to view rainfall trends and plan accordingly [2][4] - The "Heavy Rain Point Report" feature provides hourly precipitation forecasts based on user-selected locations, enhancing the service's ability to predict high-risk rainfall periods [4][5] - For agricultural users, Moji Weather assists in optimizing harvest and sowing schedules, while urban management can utilize forecasts to identify drainage issues [7] Technological Innovations - The "AI Life Index" feature focuses on outdoor activities and daily tasks, providing intelligent, hourly suitability ratings and behavior suggestions based on high-precision meteorological data [8] - This system employs a feedback loop mechanism to continuously refine its algorithms, ensuring that user needs are accurately captured and addressed [8] Broader Implications - The article notes that with increasing extreme weather events due to climate change, transforming professional meteorological data into understandable and actionable decision-making tools is becoming essential [10] - Moji Weather aims to empower users to transition from passive responses to proactive weather anticipation, thereby reducing decision-making uncertainties related to weather [10]

Group 1 - The 16th typhoon "Tabha" has formed and is expected to make landfall in Guangdong, bringing strong winds and heavy rain [2][4] - The typhoon is moving at a speed of approximately 20 kilometers per hour and is expected to strengthen before making landfall [2][4] - Rainfall in southern China, particularly in southwestern Guangdong and southern Guangxi, is expected to be significant, with some areas experiencing extreme rainfall [4][6] Group 2 - The transition to autumn is marked by the "White Dew" solar term, indicating a cooling trend in northern China, although the onset of autumn is slightly delayed compared to previous years [10][14] - High temperatures in southern China are finally easing, with regions like Zhejiang and Jiangxi still experiencing heat, but a significant drop in temperatures is anticipated after September 11 [10][12] - The northern regions are experiencing a notable drop in temperatures, with cities like Harbin and Changchun seeing lows around 10°C and 15°C respectively [14]

Group 1 - The core viewpoint of the articles highlights the unprecedented rainfall and extended rainy season in North China, marking it as the strongest since 1961 [2][6][13] - The North China rainy season began on July 5, 2023, which is 13 days earlier than the average, and lasted for 59 days, significantly longer than the typical 30 days [6][13] - The cumulative rainfall in North China has been exceptionally high, with some areas experiencing rainfall amounts 50% to 200% above the historical average [8][10] Group 2 - The rainfall has led to significant hydrological impacts, with 23 rivers exceeding warning levels, prompting a level IV flood defense response in Sichuan and Shaanxi provinces [1] - The rainfall has caused secondary disasters such as mountain floods and urban waterlogging, while also alleviating drought conditions in some regions [8][10] - The meteorological conditions contributing to this unusual weather pattern include abnormal sea surface temperatures in the equatorial Pacific and strong subtropical high pressure in the western Pacific [15]

后天，黄淮西部、江淮中北部、华南中南部等地部分地区有大到暴雨，其中，广西东南部、广东西南部 等地部分地区有大暴雨，局地特大暴雨。 央视网消息：据中国天气网消息，今天（9月6日）随着冷空气东移南下，北方降雨将结束，四川、陕西 等地部分地区仍有明显降雨。明后天，新一轮降雨又将无缝衔接，雨区大致位于四川盆地到黄淮一带。 同时，冷空气也将使得南方的高温天气收敛，北方早晚时段凉意加重，多地最低气温将创今年立秋以来 新低。 新一轮降雨将无缝衔接 四川陕西等地雨日较多 在冷空气和西南暖湿气流的共同影响下，昨天我国出现了大范围降雨。实况监测显示，陕西中南部、湖 北西部、四川盆地、贵州西部、云南东北部、山东中南部和半岛地区、江苏北部、安徽北部和东南部、 湖南北部、江西西南部、海南岛南部等地部分地区出现大到暴雨，四川东北部、重庆西南部、湖北西南 部等局地出现大暴雨，四川巴中局地特大暴雨。 今天，这轮降雨将进入收尾阶段，但陕西南部、四川东部、重庆中东部等地仍有强降雨。预计，陕西南 部、湖北西部、四川盆地东北部、重庆中东部、贵州中西部、云南北部、黑龙江东北部、山东东部、安 徽中部、江苏北部、江西西北部、湖南中部、广东东南部沿海、海南 ...

Summary of Key Points Core Viewpoint - The article discusses the impact of weather changes across various regions in China, highlighting significant rainfall in the northwest and central areas, while the southern regions continue to experience high temperatures and humidity. Group 1: Rainfall and Weather Patterns - Significant rainfall is expected in southeastern Gansu, Sichuan, Shaanxi, Shanxi, Hubei, and other areas due to the convergence of cold and warm air masses, with some regions experiencing heavy to torrential rain [1][2] - The Central Meteorological Observatory predicts that areas such as eastern Inner Mongolia, western Huanghuai, and parts of the Sichuan Basin will see moderate to heavy rain, with some areas facing heavy rain or torrential rain [2][4] - The rainfall is expected to continue, with warnings for potential secondary disasters such as mountain floods and geological hazards in regions like southern Shaanxi and eastern Sichuan due to the increased frequency of rain [4] Group 2: Temperature Variations - The southern regions are experiencing a significant expansion of high temperatures, with areas like Chongqing, Hubei, and Zhejiang recording temperatures above 35°C [5] - The article notes that the high-temperature conditions will persist, with the maximum range expected to be the largest in recent times, affecting areas from southern Henan to Guangxi and Guangdong [5] - In contrast, northern regions are experiencing a drop in temperatures due to cold air and rainfall, with maximum temperatures in places like Beijing and Shijiazhuang expected to fall below 25°C, marking a significant cooling trend [5]

Core Insights - The 2025 autumn rain in the Huaxi region of China began on August 25, which is 8 days earlier than the average start date of September 2 [1][2] - The Central Meteorological Administration forecasts an increase in rainy days and significant cumulative rainfall in the Shaanxi-Gansu-Sichuan border area over the next ten days [1][5] Summary by Sections Weather Phenomenon - Huaxi autumn rain is a unique weather phenomenon in the Huaxi region during autumn (September to November), characterized by prolonged rainy weather due to the interaction of cold and warm air masses [1] - The rainfall during this period is generally less than in summer, but persistent or heavy rainfall can lead to autumn floods [1] Affected Regions - The administrative regions primarily affected by Huaxi autumn rain include Hubei, Hunan, Chongqing, Sichuan, Guizhou, Shaanxi, Ningxia, and Gansu, covering 6 provinces, 1 municipality, and 1 autonomous region [1] Rainfall Forecast - The forecast indicates that from September 3 to 12, there will be multiple rainy days with significant cumulative rainfall in the Shaanxi-Gansu-Sichuan border area [5] - Specific dates of heavy rainfall are expected from September 3 to 6, and again from September 8 to 12, with localized heavy rain in certain areas [5]