Core Points - From October 17 to 22, Guangxi will experience strong winds and temperature drops due to continuous cold air supply, with temperature decreases of 7℃ to 9℃ in northeastern Guangxi and 4℃ to 6℃ in other areas [1] - Rainfall is expected in various regions, with the possibility of thunderstorms and localized heavy rain, particularly in northern and western Guangxi on October 18 [1] - The cold air will lead to a significant drop in temperatures, with minimum temperatures in northern Guangxi falling to 9℃ to 15℃ and maximum temperatures in northeastern areas dropping to 13℃ to 20℃ [1] Weather Impact on Agriculture and Events - Farmers in northern Guangxi should take protective measures for crops as cold weather with average daily temperatures ≤22℃ is expected for 5 to 7 days starting October 18 [2] - The strong winds and temperature drops may adversely affect the Guangxi International Cycling World Tour, necessitating caution for road and maritime safety [2] - Public health advisories recommend that vulnerable populations, such as the elderly and children, should dress warmly to prevent illnesses related to the temperature drop [2]

Group 1 - The article highlights the imminent arrival of heavy rainfall and potential secondary disasters in regions such as Sichuan and Shaanxi due to continuous rain [2][10] - Typhoon "Hagupit" is expected to enter the South China Sea on September 23, bringing strong winds and rain to southern China, necessitating public awareness and preparedness [2][10] - The Central Meteorological Administration forecasts significant rainfall across various regions, including Guangdong, Yunnan, and Sichuan, with some areas experiencing heavy to torrential rain [4][10] Group 2 - The article notes that since late August, the frequency of rainfall in the Huaxi region has increased, raising the risk of disasters such as flash floods and landslides [10] - The temperature in southern China is expected to fluctuate downwards due to the influence of cold air from the north and typhoon activity, with maximum temperatures in Jiangnan dropping to around 25°C [11][12] - Northern regions will experience noticeable cooling, with temperatures in places like Zhengzhou expected to be significantly lower than the seasonal average, necessitating precautions against the cold [12]

Group 1 - The weather in Hangzhou experienced a significant shift from extreme heat to thunderstorms and rain, marking the end of an unusual high-temperature period [1][2] - Hangzhou recorded 62 days of high temperatures this year, setting a historical record, with the average high-temperature days in Zhejiang province reaching 31 days from August 1 to September 16, which is 21 days more than the usual [1] - The average temperature in Zhejiang province from September 1 to 16 was 29.3℃, the second highest for this period in history, with 15% of national weather stations breaking or tying their historical records for September [1] Group 2 - A cold air mass is expected to significantly lower temperatures in Hangzhou, with forecasts indicating that from September 21, the maximum temperature may drop below 30℃, reaching between 26 to 28℃ [2] - The upcoming weather will transition from high-pressure systems to active tropical systems, leading to increased rainfall and thunderstorms across the region starting from Thursday [2] - The influence of tropical systems and cold air will result in scattered thunderstorms and rain across the province from September 23 to 26, necessitating ongoing monitoring of tropical system developments [2]