Core Viewpoint - The southern region of China is expected to experience the strongest rainfall of the year from May 27 to 29, with a high risk of heavy rain disasters due to the overlap with previous rainfall areas [1][34]. Group 1: Potential Geological Disasters - Strong rainfall may lead to geological disasters such as landslides, mudslides, ground subsidence, and fissures [4][34]. - Areas at high risk for geological disasters include steep slopes, valleys, and regions with mining activities or previous geological incidents [8][34]. Group 2: Signs Before Geological Disasters - Signs of impending geological disasters include muddy water in streams, movement at the foot of slopes, and unusual animal behavior [11][14]. - Specific signs for landslides include the appearance of cracks, sudden changes in water levels, and tilting trees [15][16]. - For collapses, signs include expanding cracks and falling rocks, while mudslides may be indicated by sudden changes in river flow and unusual sounds [20][22]. - Ground subsidence may be preceded by sudden changes in water levels and the appearance of circular cracks [23][34]. Group 3: Emergency Preparedness and Response - Residents should prepare emergency supplies and maintain communication tools before heavy rainfall [27][32]. - In the event of a landslide, mudslide, or collapse, individuals should evacuate quickly to higher ground and avoid low-lying areas [28][30]. - It is advised to minimize outdoor activities and carry a long pole when walking to avoid hazards like missing manhole covers [31][34].

Group 1 - The arrival of the "Xiaoman" solar term marks the transition to hotter weather in the Yellow River basin, while the southern regions will experience increased rainfall and rising river levels [1] - Northern regions have recently experienced a significant heatwave, with temperatures exceeding 40°C in several areas, breaking records for May [2] - Cold air is expected to bring a rapid decline in temperatures across northern regions, with drops of 10 to 20°C anticipated [2][3] Group 2 - Southern regions will also see a decrease in maximum temperatures, with areas previously above 30°C experiencing significant drops of 8 to 14°C [3] - From May 22 to 24, temperatures across many regions will shift from significantly above average to below average, prompting residents to adjust their clothing accordingly [5] - Heavy rainfall is forecasted for southern regions, particularly in the next few days, with the potential for severe weather conditions including thunderstorms and localized heavy downpours [6][8] Group 3 - The upcoming ten days will see frequent rainfall in Jiangnan and South China, with some areas experiencing rainfall amounts 1 to 2 times higher than the average for this period [10] - The proverb "Xiaoman Xiaoman, rivers gradually fill" suggests that river levels in Jiangnan and South China may continue to rise, increasing flood prevention pressures [12]

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]

央视网消息：据公安部交通管理局公众号消息，昨天，云南、贵州、广西、广东、湖南等多地出现大到暴雨，局地大 暴雨。据中央气象台预报，今明两天，南方降雨范围将明显扩大，西南地区东部、江汉东部、江南、华南等地部分地 区将有中到大雨，局地暴雨，伴有短时强降水、雷暴大风等强对流天气。其中—— 今天，西藏东南部、青海南部、四川盆地西部、贵州南部、云南东部、江淮西部、江南大部、华南北部和西部、海南 岛等地部分地区有中到大雨，其中，贵州东南部、湖南西南部、江西中北部、广西北部等地部分地区有暴雨。 这里要提醒一下北京的人们，明天华北北部的这场雷阵雨，落在北京的时段预计为明天（周五）的傍晚前后至前半 夜，并伴有短时大风，部分地区有冰雹，对晚高峰出行有一定影响。所以务必及时关注临近预报预警信息，注意出行 安全。 目前南方地区已进入多雨期，广西、湖南、江西、浙江等地在未来一周累计雨量较大。同时，华北、东北地区要警惕 强对流天气。 公安部交通管理局提醒：强降雨、强对流天气下，要及时关注气象部门的临近预警预报，以及公安交管、交通运 输、应急管理等部门发布的临时管制、防灾等相关信息，尽量选择公共交通出行。确需自驾出行的，要合理规划行车 路线 ...

Group 1 - The China Meteorological Administration has issued a Level 3 emergency response due to expected heavy rainfall in southern regions from the night of May 7 to May 9 [1] - The Guangzhou Railway Bureau has announced delays and cancellations for certain trains on the Jingguang and Jiheng lines due to rainfall exceeding warning levels in southern Hunan [4] - High-speed rail services remain unaffected, and passengers are encouraged to switch to high-speed trains if needed [4] Group 2 - Wuyishan National Park has temporarily closed its scenic road due to weather conditions [6] - The Yixing Bamboo Sea scenic area will suspend operations of its cableway on May 8 [10] - The Suzhou Transportation Administration has announced a navigation ban on Taihu Lake starting from May 7, 20:00 [10]

Group 1 - Guangdong province experienced heavy rainfall from May 5 to May 6, with 118 towns affected by rainstorms and the maximum rainfall reaching 226.4 mm [1][2] - The meteorological department reported that 17 towns recorded over 100 mm of rain, while 101 towns recorded between 50 mm and 100 mm [2] - The rainfall has led to a high risk of geological disasters in areas such as Jiangmen, Yangjiang, and Qingyuan, with a risk level of three [1] Group 2 - Shenzhen airport faced significant flight delays due to thunderstorms, with a yellow alert for widespread flight delays issued by China Southern Airlines [1] - In Foshan, heavy rainfall was recorded, with over 90 mm in just three hours in the Nanhai District, prompting an upgrade of the rainstorm warning from orange to red [1][2] - The meteorological forecast indicates further thunderstorms and potential heavy rain in the coming days, with a new round of rainfall expected from May 9 to May 10 [2]