暴雨大暴雨要来了。 今明两天（9月21日至22日），华西秋雨再度发展，四川、陕西等地部分地区有暴雨，需注意防范连续降雨可能引发的次生灾害。此外，今年第18号台风"桦 加沙"23日将进入南海海域，华南多地再迎强风雨天气，公众请关注临近预报信息，及时做好台风防御措施。 四川陕西等地降雨再起 台风"桦加沙"将影响华南 今年第17号台风"米娜"已于昨晨8时停止编号，但其残涡仍给广东等地带来了强降雨天气，同时四川盆地等地部分地区出现较强降雨，监测显示，昨天8时至 今天6时，广东中部和东部沿海、福建东南部出现暴雨，广东中部等部分地区大暴雨；四川东部、重庆西部、云南西部、贵州西部、广西西部、江西东北部和 南部、浙江南部等地出现大到暴雨，其中浙江温州出现大暴雨或特大暴雨。 今明天，四川盆地至陕西中南部一带的秋雨进一步发展增强，部分地区有暴雨。此外，随着台风"桦加沙"逐渐靠近，明后天华南部分地区将再现强风雨天 气。 具体来看，中央气象台预计，今天，广东中西部、广西东部、福建东北部、江西南部、云南中东部、四川中东部、贵州西部、重庆西南部、甘肃东部、陕西 中南部、河南北部、山西南部、河北南部等地的部分地区有中到大雨，其中，广东中部 ...

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]