Core Viewpoint - The weather forecast indicates significant rainfall and potential mountain flood risks in Hohhot, with specific warnings issued for various districts and counties [1][3][7]. Weather Forecast - From October 8 to October 9, rainfall is expected to vary across regions, with northern Wuchuan receiving up to 25 mm, while southern Wuchuan, Tuzu, and other areas may see 25-50 mm, and some regions could experience 50-80 mm [1]. - The maximum hourly rainfall is projected to be between 10-20 mm [1]. Risk Warnings - A yellow warning has been issued for Tokto County, indicating a high likelihood of mountain flood disasters, while a blue warning applies to several other districts including Xincheng, Saihan, and Huimin [3][4]. - Specific towns within these districts are highlighted as areas of concern, with detailed warnings for various locations [4][5]. Impact on Agriculture - The ongoing heavy rainfall is expected to adversely affect the autumn harvest, prompting agricultural departments to advise on expediting the collection of mature crops [6]. Temperature Changes - A notable drop in temperature is anticipated, with daytime highs decreasing from around 20°C to below 15°C, and some areas may experience temperatures dropping to 10°C or lower [6][8]. Additional Weather Events - The forecast includes the possibility of secondary disasters such as geological hazards and urban flooding due to the expected heavy rainfall [7][8]. - The weather conditions are expected to persist, with continued rain and potential snow in certain areas over the following days [10][12].

Core Points - The article discusses the impact of Typhoon "Haikashan" on coastal areas in Guangdong Province, particularly the risk of seawater backflow in low-lying regions [1][2] - The typhoon is expected to make landfall between Taishan and Zhanjiang in Guangdong on the afternoon to evening of September 24, with maximum wind speeds of 55 m/s (approximately 198 km/h) [1] - A red alert for storm surges has been issued for several cities in Guangdong, indicating a significant risk of flooding [2] Group 1 - Coastal low-lying areas in Shenzhen, Dongguan, Guangzhou, Zhongshan, and Zhuhai are at high risk of seawater backflow due to Typhoon "Haikashan" [1][2] - The storm surge is expected to reach 60 to 120 cm in certain areas, with the highest levels of 120 to 280 cm forecasted for the coastline from Huizhou to Yangjiang [2] - Emergency response measures are in place, including the evacuation of residents in vulnerable areas and the closure of coastal recreational facilities [2] Group 2 - Citizens are advised to monitor storm surge warnings and prepare for potential urban flooding, including avoiding contact with metal objects during storms [3] - Recommendations for navigating urban flooding include using sturdy objects to probe for deep water and avoiding low-lying areas [3] - Precautionary measures for homes in low-lying areas include creating barriers to prevent water ingress and using waterproof materials for storage [3]

Group 1 - Guangzhou schools have received notices to suspend classes due to the impending typhoon, with a yellow warning expected to upgrade to orange [1][2] - The education bureau's guidelines mandate class suspension when a yellow or higher typhoon warning is issued [1] - In Foshan, the typhoon blue warning has been upgraded to yellow, leading to similar class suspension measures [3] Group 2 - Shenzhen has initiated a level four response to the super typhoon "Haikui," which is currently about 100 kilometers from the city [4] - The city has prepared 865 emergency shelters and is conducting safety checks on vulnerable infrastructure [4] - Experts warn of three main risks from "Haikui": extreme winds, potential flooding from astronomical tides, and significant rainfall expected to reach around 300 millimeters [5][6]

Core Viewpoint - Zhengzhou has issued a meteorological risk warning for urban waterlogging due to expected heavy rainfall, prompting the activation of a Level 4 flood emergency response [1][6]. Rainfall Forecast and Risk Areas - The forecast indicates heavy rain and downpours in Zhengzhou on September 11, with the most intense rainfall expected between 11 AM on the 11th and 2 AM on the 12th, with maximum hourly rainfall around 30 mm [1][3]. - The entire urban area of Zhengzhou is classified as a high-risk zone for urban waterlogging during this rainfall event, particularly from the afternoon to night of September 11 [3]. Flood-Prone Locations - Key locations at risk of water accumulation include culverts, underpasses, low-lying areas, underground passages, shopping malls, and parking garages during the heavy rainfall period [4]. School Closures and Public Safety Measures - All non-boarding primary and secondary schools, as well as kindergartens in Zhengzhou, will be closed for one day on September 11 [5]. - The flood control command requires all relevant units to implement preventive measures, closely monitor rainfall developments, and enhance public warnings. Citizens are advised to avoid unnecessary outdoor activities [6].

Core Points - Zhengzhou is under a significant weather alert due to a large-scale rainfall event expected from the night of September 10 to September 11, with rainfall amounts projected between 80 to 120 millimeters, and localized areas receiving up to 160 millimeters [1][4] - The primary period of intense rainfall is forecasted to occur from 11 AM to 2 AM on September 12, with the potential for urban flooding across the entire main urban area of Zhengzhou [2][4] Risk Areas and Timing - The entire urban area of Zhengzhou is classified as a high-risk zone for urban flooding due to the anticipated heavy rainfall [2][4] - The critical time frame for severe rainfall and flooding risk is identified as September 11 from 11 AM to 2 AM [2][4] Flood-Prone Locations - Specific locations at high risk for flooding include culverts, underpasses, low-lying areas, underground passages, shopping malls, and parking garages [3][4] - Residents are advised to avoid certain routes known for flooding, including sections of Jingguang Road and various underpasses [3][4] Safety Precautions - Individuals are urged to stay away from hazardous areas such as billboards, transformers, and construction sites to prevent accidents [5] - It is recommended to avoid wading through water and to be cautious of potential hazards like manholes and drainage systems [5] - Drivers should refrain from driving through flooded areas and should be vigilant about water levels in low-lying regions [5]

Core Points - The Inner Mongolia Meteorological Station issued a yellow lightning warning, indicating that areas including northern Chifeng, most of Tongliao, eastern Hinggan League, and eastern and northern Hulunbuir will experience lightning activity within the next six hours [1] - The warning also mentions the possibility of severe weather conditions such as short-term heavy rainfall, thunderstorms, strong winds, and hail, which could lead to disasters like lightning strikes, flooding, and urban waterlogging [1] Summary by Category Weather Warning - A yellow lightning warning has been issued for specific regions in Inner Mongolia, highlighting the expected occurrence of lightning activity [1] - The warning covers northern Chifeng, most of Tongliao, eastern Hinggan League, and eastern and northern Hulunbuir [1] Severe Weather Conditions - Local areas may experience short-term heavy rainfall, thunderstorms, strong winds, and hail [1] - These severe weather conditions pose risks of lightning, flooding, and urban waterlogging [1] Preparedness Measures - Relevant government departments are advised to carry out lightning prevention work [2] - The public is encouraged to closely monitor weather updates and minimize outdoor activities during this period [2]

Group 1 - The article discusses the dangers of urban waterlogging caused by heavy rainfall and emphasizes the importance of safety measures during such events [1][2] - A simulation conducted by Hangzhou Fire Department demonstrated the rapid rise of water levels in underground spaces, making escape difficult [1] - The article highlights the need for individuals to choose safer escape routes, such as stairway exits, when faced with rising water levels [1] Group 2 - In situations where escape routes are blocked, individuals should seek air pockets to breathe, as these can form in enclosed spaces [2] - The article warns about the risks of "invisible traps" in urban flooding, such as manhole covers being dislodged by strong water currents [3] - It advises individuals to avoid walking near manhole covers and to choose higher ground and clear visibility routes during flooding [3]

Group 1 - Urban waterlogging typically occurs in low-lying areas, dilapidated buildings, construction sites, and underground spaces such as subways, underground malls, garages, and basements [3] - During the flood season, it is essential to actively avoid urban flooding risks by monitoring weather forecasts and flood risk warnings [5] - In case of indoor flooding, it is crucial to cut off the power and gas supply and evacuate to higher ground or rooftops [7] Group 2 - When encountering outdoor flooding, individuals should avoid walking through water and stay close to buildings, avoiding conductive objects like power lines and trees [9] - For drivers, it is important to park vehicles in higher ground and leave the car instead of seeking shelter inside [11] - When crossing flooded roads, one should observe water depth using reference points and abandon the vehicle if water rises above the axle [11]

Core Points - Recent heavy rainfall in North China has led to significant urban flooding risks, particularly in Shandong province due to local drainage capacity issues [1][3] - The article emphasizes the importance of safety measures and self-rescue techniques during urban flooding events [4][5] Summary by Sections Urban Flooding Causes - Urban flooding is primarily caused by local rainfall and inadequate drainage systems, leading to water accumulation in low-lying areas [3] - Areas most susceptible to flooding include underpasses, underground transportation, basements, and construction sites [3] Safety Measures During Flooding - Residents are advised to monitor weather warnings and take preventive measures, such as building barriers with sandbags in vulnerable areas [4] - It is crucial to avoid electrical hazards and to cut off power and gas supplies during flooding [4] Vehicle Safety - Drivers should avoid flooded areas and park vehicles in higher locations to prevent water damage [5] - If a vehicle becomes submerged, occupants should break windows to escape and avoid restarting the engine [5] Post-Flood Health Precautions - After flooding, it is important to avoid drinking untreated water and to ensure food safety by reheating leftovers [8] - The article suggests preparing emergency kits with essential supplies and maintaining communication with neighbors for emergency planning [10]