中东部今起降雨发展增多 陕西河南等地明起迎明显降温

Group 1 - The article highlights an increase in rainfall across central and eastern China starting from May 21, with enhanced precipitation in Jiangnan and South China, including heavy rain and localized torrential rain [1] - Rainfall in the eastern Northwest and Huanghuai regions is expected, which will help alleviate meteorological drought conditions [1] - A cold air mass is arriving, leading to a temperature drop in the following days, with a significant decrease of up to 15°C in some areas of central and eastern China, necessitating public awareness to dress appropriately to avoid catching a cold [1]