双预警齐发！暴雨、大暴雨，40℃以上高温

Group 1 - The Central Meteorological Administration issued a blue rainstorm warning, predicting heavy rain in southern and western Guangdong, central and southern Guangxi, western Hainan Island, and other regions from August 18 to August 19, with rainfall expected to reach 100-120 mm in some areas [1] - Short-term heavy rainfall is expected, with maximum hourly rainfall of 20-50 mm, and localized areas may exceed 70 mm, accompanied by thunderstorms and strong winds [1] Group 2 - A yellow high-temperature warning was also issued, forecasting temperatures between 35-39°C in various regions, with some areas like Shaanxi Guanzhong, Chongqing, and Hunan's northern part potentially exceeding 40°C [2] - Recommendations for heat prevention include reducing outdoor activities, providing guidance for vulnerable populations, and ensuring safety for outdoor workers [3]