受台风“桦加沙”影响，广东这些区域今天中午前后海水倒灌风险高

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]