暴雨大暴雨，要来了！

Group 1 - The article highlights the upcoming heavy rainfall in Sichuan and Shaanxi, with warnings about potential secondary disasters such as landslides and floods due to continuous rain [1][2][7] - Typhoon "Haikashan" is expected to enter the South China Sea on September 23, bringing strong winds and rain to southern regions, with the most significant impact anticipated from September 23 to 25 [1][7] - The Central Meteorological Administration forecasts that various regions, including parts of Guangdong, Yunnan, and Sichuan, will experience moderate to heavy rain, with some areas facing torrential downpours [2][4][5] Group 2 - The article notes that since late August, the frequency of rainfall in the western region has increased, leading to heightened disaster risks, particularly in areas already affected by previous rainfall [7] - The temperature in southern China is expected to decline due to the influence of cold air from the north and typhoon activity, with maximum temperatures in Jiangnan dropping to around 25°C [8] - Northern regions will experience noticeable cooling, with temperatures in North China and Northeast China remaining around 20°C during the day and 10°C at night, necessitating precautions against the cold [8]