当短时强降水发生时，雨水来不及充分渗入深层土壤，大部分会在地表形成快速流动的水流。这些水流 冲刷地表的松散土石并将其裹挟，易形成泥石流。同时，表层土壤在短时间内因雨水饱和，就像被泡软 的蛋糕一样失去原有的稳定性，容易发生浅层滑坡。 而在持续性降水的作用下，雨水会慢慢渗入土壤深层，就像给山体"喝水"。水分顺着岩土体中的孔隙或 裂隙不断渗透，导致岩土体自重增加并发生泥化、软化现象，坡体强度和稳定性降低。当深层土壤和岩 层之间的摩擦力被水分削弱到一定程度时，就可能发生深度较大的滑坡，土石量大、破坏性强。 即使已经雨过天晴，也不意味着风险解除。雨水渗到土壤中是一个持续的过程。雨停后水分仍在向土壤 深层渗透，可能数天后山体内部的土壤才达到饱和状态，从而诱发滑坡。此外，雨后阳光照射使表层土 石中的水分大量蒸发，岩土体中收缩裂缝易导致土石层松动，在重力作用下也易发生滑坡。 气象专家提醒，正值暑期旅游旺季，建议景区加强防范措施，游客要根据天气预报合理安排行程。此 外，长江流域中小河流密布，需要注意防范可能发生的中小河流洪水。 近几天，一条沿着长江走向的雨带让川渝至苏皖一带降雨频繁。降水分布不均匀、单点强度大，是这条 雨带的突 ...

Summary of Key Points - The weather forecast indicates that Beijing will experience scattered showers or thunderstorms in the coming days, with significant rainfall expected around August 4 [1][2] - The temperature in Beijing has slightly decreased, with a maximum of 30.3°C recorded recently, but the humidity will make it feel hot during the day [1][2] - The Beijing Meteorological Station predicts that the weather will transition from sunny to cloudy, with varying temperatures and conditions over the next few days, including thunderstorms and rain [2] - Public safety measures are advised due to the potential for geological disasters from accumulated rainfall, particularly in mountainous and valley areas [2]

Group 1 - The recent heavy rainfall in northern China has been influenced by a combination of factors, including stable subtropical high pressure, prolonged convective activity, and orographic lifting from the Yanshan and Taihang mountains [2][4] - Specific areas such as Yixian in Hebei and Miyun in Beijing have experienced localized rainfall exceeding 400 to 500 millimeters, approaching their annual average precipitation [2] - The current heavy rainfall event is expected to gradually diminish by the 30th, as the subtropical high pressure retreats southward and moisture transport decreases [4] Group 2 - Typhoon "Zhu Jie Cao" is expected to impact the eastern China region, with forecasts indicating it may make landfall on the 30th, bringing significant rainfall to areas like southern Jiangsu, Shanghai, and eastern Zhejiang [5][7] - The typhoon's trajectory suggests it will slow down as it moves inland, necessitating close monitoring of its potential for sustained rainfall in the eastern regions [7] - The weather patterns indicate a shift from northern heavy rainfall to increased precipitation in the eastern coastal areas due to the typhoon's influence [5]

Core Points - Typhoon "Vipa" made landfall in Guangdong and is expected to bring continuous rainfall to multiple regions including Guangdong, Guangxi, and Hainan [2] - A geological disaster meteorological risk warning was issued for certain towns in Hainan, indicating a risk of rainfall-induced geological disasters [2] - An orange flood disaster meteorological risk warning was also issued, highlighting the potential for mountain flood disasters in several cities and counties in Hainan [3] Group 1 - Typhoon "Vipa" made landfall in Guangdong at 17:50 on July 20, 2023, and weakened from a strong tropical storm to a tropical storm by 21:00 [2] - The typhoon is expected to move along the western coast of Guangdong, causing sustained rainfall in the affected areas [2] - A joint warning was issued by the provincial natural resources and planning department and the meteorological bureau regarding geological disaster risks in four specific counties [2] Group 2 - The orange flood disaster meteorological risk warning indicates a high likelihood of mountain flood disasters in several regions, including Sanya, Danzhou, and others [3] - Certain areas in Danzhou and other counties have reached an orange warning level for flood disaster risks [3] - The warnings advise residents in the affected areas to stay alert to changes in warning information and avoid high-risk zones [3]

Summary of Key Points Core Viewpoint - The province is expected to experience intermittent rainfall from July 2 to July 8, with significant rainfall and potential severe weather events such as thunderstorms, strong winds, and hail due to the influence of subtropical high pressure and upper-level troughs [1][2]. Group 1: Weather Impact - The rainfall in northern Shaanxi is expected to be prolonged, while western and northwestern Guanzhong will experience intense rainfall, leading to high cumulative precipitation and short-duration heavy rain [1]. - There is a high risk of secondary disasters such as mountain floods, geological hazards, and urban flooding due to the heavy rainfall, particularly in northern Shaanxi where some small and medium rivers are nearing warning levels [1]. - High temperatures in eastern Guanzhong and eastern Ankang may trigger localized severe convective weather, including thunderstorms and hail [1]. Group 2: Agricultural Recommendations - Agricultural experts recommend timely irrigation in areas like southern Xianyang, northern Xi'an, and Weinan, where soil moisture is lacking, and to implement measures such as spraying and shading in kiwi and grape planting areas to prevent sunburn from high temperatures [1]. - Farmers in northern Shaanxi and western Guanzhong should clear drainage ditches in advance to mitigate the adverse effects of water accumulation on crops and enhance pest monitoring and control [1]. - In apple and kiwi production areas in northern Shaanxi and western Guanzhong, precautions should be taken against wind and hail damage to branches and fruits [1]. Group 3: Transportation and Tourism - The rainfall is causing slippery conditions on roads and railways in northern Shaanxi, western and northwestern Guanzhong, with specific highways and rail lines experiencing significant rainfall and high risks of secondary disasters affecting transportation safety [2]. - With the increase in tourists during the summer, local tourism departments are advised to monitor weather forecasts and warnings to mitigate the adverse impacts of severe weather on tourist attractions and outdoor facilities [2].

Core Points - Sichuan province experienced significant rainfall from June 28 to 29, with heavy rain primarily in the western and southern basin areas, leading to the evacuation of 29,142 people across 57 counties [1][2][5] Weather Forecast and Impact - The heavy rainfall is expected to continue until the night of June 30, with a yellow rainstorm warning issued for several cities, indicating potential heavy to torrential rain [2][6] - The rainfall intensity is notable, with some areas experiencing over 250 mm of rain, and the potential for localized extreme rainfall events [6][7] Geological and Flood Risks - An orange warning for mountain flood disasters was issued, indicating a high likelihood of such events in 11 counties, while 37 additional counties face a moderate risk [4][5] - The geological disaster risk warning covers 18 cities and 97 counties, marking the largest warning issued this summer in Sichuan [5] Emergency Response - The provincial geological disaster prevention office is actively monitoring and advising on potential hazards, urging residents in at-risk areas to evacuate and avoid dangerous locations [3][5]

Core Viewpoint - The article highlights the issuance of multiple weather warnings related to heavy rainfall and potential geological disasters in various regions of China, particularly focusing on the eastern part of Sichuan, western Chongqing, and northeastern Yunnan, urging local authorities and the public to take necessary precautions [1][11][13]. Summary by Sections Weather Warnings - The Ministry of Water Resources and the China Meteorological Administration issued a red alert for mountain flood disasters, indicating a high likelihood of such events in specific areas from June 29 to June 30 [1]. - A yellow alert for heavy rain was also issued, predicting significant rainfall in regions including eastern Sichuan and southwestern Chongqing, with localized areas experiencing extreme rainfall of 250 to 280 millimeters [11]. Affected Areas - Specific counties and districts in Sichuan and Chongqing are identified as high-risk areas for mountain floods, including locations in Luzhou, Yibin, and others [4][6][10]. - Geological disaster risk warnings were issued for eastern Sichuan, western Chongqing, and southeastern Guizhou, advising local governments to prepare for potential geological hazards [13]. Public Safety Measures - The article emphasizes the importance of real-time monitoring, flood prevention measures, and public awareness regarding the risks of geological disasters, urging individuals to avoid high-risk areas [1][13].

Group 1 - Continuous heavy rainfall in Southwest China, particularly in Guizhou and Hunan, with some areas experiencing over 100 mm of rainfall from June 25 to 26 [1][3] - The Ministry of Water Resources and the China Meteorological Administration issued a yellow warning for mountain flood disasters on June 26 [1] - Geological disaster meteorological risk warnings were also issued due to high risks of mountain floods and geological disasters in regions like Yunnan, Guizhou, and Chongqing [3] Group 2 - The Ministry of Water Resources issued targeted flood and mountain flood disaster warnings to 11 provinces, maintaining a Level 4 emergency response for flood defense in six provinces [5] - Rescue operations are ongoing in Southern China, with various departments mobilizing to ensure public safety [6] - In Guizhou, recovery efforts are underway, including drainage and cleaning operations following severe flooding [7][9] Group 3 - Traffic controls have been implemented on multiple highways and national roads in Guizhou due to the heavy rainfall, affecting 16 road sections and 8 toll stations as of June 26 [11] - A bus carrying 10 passengers was rescued after being swept away by rising water in Guangxi, highlighting the dangers posed by the ongoing weather conditions [13][15] Group 4 - Meteorological analysts attribute the continuous heavy rainfall to the onset of the plum rain season and the influence of typhoons, leading to a significant weather pattern affecting both northern and southern regions [16][18]

中央气象台消息，预计5月27日至29日，我国南方将出现今年以来最强降雨过程，并与前期强降雨区高度叠加，暴雨灾害风险高。新一轮强降雨过程范围 广、累计降水量大，地质灾害风险不容忽视。强降雨可能引发哪些地质灾害？地质灾害发生前，有哪些征兆？如遇地质灾害，有哪些避险要点？ 强降雨可能引发哪些地质灾害？ 专家提示，强降雨或持续降雨可能引发山体崩塌、滑坡、泥石流、地面塌陷、地面沉降、地裂缝等地质灾害。 地质灾害发生前，会有哪些征兆？ 专家介绍，地质灾害在发生前其实都有预兆。如何识别预判？ 驾呼附빅批기久哪三心火 灾害?地质灾害发生前,有哪 些征兆? 容易发生地质灾害的重点区域 集中在山坡上、沟谷内、陡崖 旁、水体边，坡度较大的村寨区 域、切坡建房区域、村组道路开 挖和道路硬化坡面雨水形成的汇 集区,采矿活动区域、山区道路 落石崩塌区域、工程建设和弃土 弃渣区域、已发生过地质灾害区 域。 地质灾害发生前 有ं 00 1 1 沟水浑、坡脚动、树木莲、 墙牙裂、动物惊 滑坡发生前征兆 堵塞多年的泉水复活,或者 出现泉水(水井)突然干 枯、井（钻孔）水位突变; 士体出现上隆(凸起);坡 头山 In 进 台 TL AII 台 出 ...

Core Viewpoint - Southern China is expected to experience a new round of heavy rainfall from May 21 to 24, with the most intense period occurring tomorrow, leading to potential geological disasters and secondary hazards [1][3][5] Summary by Relevant Sections Rainfall Forecast - From May 21 to 24, regions including Anhui, Hubei, Hunan, Jiangxi, and Guangxi will face heavy rain, with some areas experiencing rainfall exceeding 60 mm in 6 hours, and localized areas potentially reaching over 120 mm [1][3] - The rainfall pattern is characterized by a broad range but varying intensity, with some areas experiencing severe downpours [1][5] Weather Conditions - The rainfall will be accompanied by strong convective weather, including thunderstorms and hail, particularly in the eastern Southwest region, Jianghan, Jianghuai, Jiangnan, and northern South China [1][3] - The intensity of rainfall is expected to increase tonight in eastern Sichuan, Chongqing, and northern Guizhou, with potential for heavy rain and localized severe storms [3] Geological and Hydrological Risks - There is a high risk of geological disasters in regions such as northwestern Guangxi, southern Chongqing, and western Zhejiang due to the anticipated heavy rainfall [7] - The overlap of strong rainfall areas with previously saturated regions raises concerns for flash floods and other secondary hazards [5][7]