Core Points - Storm surge is a major marine disaster affecting China, causing 99% of direct economic losses from various marine disasters in recent years [1] - The National Marine Forecasting Center has raised the storm surge warning level to the highest red level due to Typhoon "Maidum" [1] Group 1: Storm Surge Overview - Storm surge is caused by tropical cyclones, temperate cyclones, and other storm systems, leading to abnormal sea level rise or fall [2] - The disaster can result in ship collisions, grounding, or sinking, and damage to coastal aquaculture and salt production [3] Group 2: Warning Levels and Recommendations - Storm surge warning levels are categorized into four: blue, yellow, orange, and red [5] - During the red warning period, it is advised to evacuate nearshore personnel, close dangerous coastal areas, and inspect coastal defenses [7] Group 3: Impact of Combined Storm Surge and Astronomical Tide - The current period coincides with astronomical tides along the coasts of Guangdong and Hainan, potentially leading to over three meters of storm surge [8] - If a storm surge coincides with a high astronomical tide and strong winds, it can lead to significantly higher tide levels and more severe impacts [11]

Core Points - Typhoon "Haikashan" is expected to make landfall in Guangdong, China, on the evening of September 24, with a strength of typhoon or super typhoon level [1] - The typhoon has already caused severe wind and rain impacts in Guangdong, Fujian, Zhejiang, Jiangsu, and Taiwan, with some areas experiencing heavy rainfall [2] - The typhoon's influence coincides with a spring tide, leading to significant storm surges along the Guangdong coast, raising concerns about seawater inundation in cities like Hong Kong and Macau [6][8] Weather Impact - From September 24 to 26, strong wind and rain are expected in the Taiwan Strait, northern South China Sea, and southern China, with wind speeds reaching 10-13 levels and gusts up to 16-17 levels in some areas [4] - Heavy rainfall is anticipated in various regions, including parts of Guangdong, Guangxi, Hainan, Fujian, and Zhejiang, with localized areas facing extreme rainfall [4][5] Subsequent Weather Events - Following "Haikashan," Typhoon "Bolaven" has formed and is expected to approach the eastern coast of the Philippines by September 27, potentially bringing further heavy rainfall to southern China from September 28 to October 1 [7]

Group 1 - Typhoon "Hagupit" is expected to be the strongest typhoon to make landfall in China this year, with significant impacts anticipated [1] - The typhoon has a diameter exceeding 1000 kilometers, indicating its large energy and abundant moisture, necessitating high attention to its subsequent effects [1] - The cold air moving southward is influencing the typhoon's path, which will primarily move westward along the coasts of Guangdong and Guangxi [1] Group 2 - The typhoon's wind radius is 150 kilometers, and vessels in the affected sea areas are advised to return to port and secure port facilities [1] - The combination of the astronomical tide during the lunar calendar's third day and the storm surge from "Hagupit" may lead to seawater backflow in the Pearl River Estuary [2] - Residents are urged to prepare emergency supplies, secure windows and doors, avoid going outside, and closely monitor relevant warnings and forecasts [2]

Core Points - Typhoon "Haikui" is approaching Guangdong, expected to make landfall between Zhuhai and Zhanjiang on the afternoon to evening of the 24th [1] - Experts indicate that "Haikui" is not the strongest typhoon in history, with the 2014 typhoon "Rammasun" having a higher recorded intensity [2] - "Haikui" has developed into the strongest typhoon globally this year, with a central pressure of 920 hPa and a vast cloud system with a circulation diameter exceeding 1000 kilometers [7] Summary by Category Typhoon Characteristics - "Haikui" has a maximum radius of nearly 200 kilometers for its 10-level danger wind circle, which can uproot trees and lift roofs [7] - The typhoon's impact coincides with a period of astronomical tides, raising concerns about potential seawater backflow in the Pearl River Delta region [7] Historical Context - Guangdong is the province most frequently affected by typhoons, with a peak occurrence from May to December, particularly from July to September [3] - From 1949 to 2024, 13 strong typhoons and 3 super typhoons have made landfall in Guangdong [8] Regional Impact - The western coastal areas of Guangdong are more prone to typhoons, with Zhanjiang experiencing the highest number of landfalls at 69, followed by Yangjiang with 34 [5] - Factors such as terrain and cold air will influence "Haikui's" intensity and trajectory, with expectations of a gradual weakening after landfall [9]

Core Viewpoint - The super typhoon "Haikashan" is approaching China, expected to bring extreme wind and rain to southern regions, particularly affecting Guangdong and surrounding areas [2][6]. Group 1: Typhoon Characteristics - "Haikashan" intensified rapidly, becoming a super typhoon on September 21, with wind speeds exceeding 17 levels [2]. - The typhoon is currently located approximately 750 kilometers south-southeast of Yangjiang, Guangdong, and is moving northwest at about 20 kilometers per hour [2]. Group 2: Affected Regions and Weather Forecast - From September 23 to 25, regions in South China and southern Jiangnan are expected to experience heavy rainfall, with localized areas in Taiwan and coastal Guangdong potentially receiving over 400 millimeters of rain [2]. - The Central Meteorological Observatory predicts heavy to torrential rain in several areas, including parts of Liaoning, Shandong, Jiangsu, and Taiwan [3][4]. Group 3: Preparedness and Risks - Coastal areas in Guangdong, Guangxi, Hainan, Fujian, and Hong Kong need to prepare for the typhoon's impact, as the strong winds pose a high disaster risk [6]. - The occurrence of astronomical tides during this period may lead to seawater backflow in cities like Guangzhou and Zhuhai, increasing the risk of storm surges [7].

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 - Typhoon "Hagupit" has rapidly intensified into a super typhoon, becoming the strongest storm globally this year, directly impacting China's southern coastal regions [1][2]. Group 1: Typhoon Characteristics - Typhoon "Hagupit" has shown remarkable strength, reaching a peak intensity of 62 meters per second (Category 17) with a minimum central pressure of 910 hPa, surpassing other storms in the Southern Hemisphere and the North Atlantic [1][2]. - The typhoon's strength is attributed to high sea temperatures from the summer, weak vertical wind shear, and significant moisture transport from the southwest monsoon and subtropical high-pressure systems [2][3]. Group 2: Impact on Southern China - The potential landing area for "Hagupit" is likely between Huizhou, Guangdong, and Wenchang, Hainan, with the highest probability along the central-western Guangdong coast [3][5]. - The storm is expected to bring heavy rainfall and strong winds, affecting eight provinces, with localized areas experiencing extreme rainfall [7][8]. Group 3: Weather Conditions and Risks - The period of landfall coincides with a spring tide, increasing the risk of storm surges along the Pearl River Delta, necessitating precautions against flooding [8]. - Significant weather impacts are anticipated from September 23 to 26, with high risks for various ports and highways in Guangdong, Guangxi, Hainan, and other regions [9]. Group 4: Seasonal Typhoon Activity - The recent clustering of typhoons is typical for September, a month characterized by high sea temperatures and favorable conditions for typhoon formation [11].