暴雨、大暴雨、风沙，都来了！

Group 1 - The southern regions of China are experiencing strong rainfall, with localized heavy rain or torrential rain expected in Jiangnan and South China during the holiday period [1][2][4] - The northern regions are also seeing increased rainfall, particularly in North China, where light rain is anticipated [2][4] - The Central Meteorological Observatory forecasts that the maximum temperature in the middle and lower reaches of the Yangtze River will drop to around 25°C due to cold air and rain [6] Group 2 - The next two days will see significant rainfall in southern areas, with specific regions like southwestern Anhui, central and southern Hunan, and parts of Guangdong experiencing heavy rain and localized torrential rain [4][5] - Following this, another round of rainfall is expected to hit southern regions, with areas like southwestern Chongqing and central Guangdong likely to see moderate to heavy rain [5][6] - Cold air will also bring strong winds and sandstorms to northern regions, with wind speeds reaching 5 to 7 levels and gusts up to 11 levels in some areas [6]