未来10天南方高温发展，5日后北方将现气温大逆转

Group 1: Temperature Trends - Southern China continues to experience high temperatures, particularly in Jiangxi, Hunan, Zhejiang, and Fujian, with forecasts indicating temperatures reaching 35-38°C from October 3 to 9 [1] - Cities like Hangzhou and Nanchang have already set records for the number of high-temperature days this year, with Hangzhou and Nanchang recording 66 and 70 days respectively [1] - Night temperatures in Jiangnan and South China are also significantly higher, with some areas reaching 27°C, nearly 10°C above the seasonal average [1] Group 2: Northern Temperature Changes - Northern regions, including North China and Northeast China, are experiencing unusually warm temperatures, with highs above 25°C and nighttime lows between 15-20°C [2] - A strong cold front is expected to bring a significant temperature drop in the north after October 5, with cities like Harbin seeing a drop from 27°C to 15°C in just two days [2] Group 3: Precipitation and Weather Events - Heavy rainfall is anticipated in the Sichuan Basin to Huanghuai and North China, with cumulative rainfall expected to reach 50-160 mm from October 2 to 5, and localized areas exceeding 250 mm [3] - Typhoon "Maidum" is forecasted to approach the coastal areas of Qiong and Guangdong, potentially making landfall around October 5, marking the ninth typhoon to hit China this year [3]