冷空气来预报了，下周六前后最高气温或降10℃

Group 1 - The core viewpoint of the articles highlights the unusual persistence of high temperatures in Zhejiang province, with historical records being broken for October temperatures due to the strong influence of the subtropical high-pressure system [1][2] - The average temperature in the province from October 3 to October 9 was 29°C, which is 8.2°C higher than the normal for this period, marking the highest historical average for this time [1] - The number of high-temperature days in Hangzhou has reached 68, setting a historical record, and is expected to exceed 70 days after the current heat wave [1] Group 2 - The subtropical high-pressure system is positioned unusually far north at around 30°N, which is causing the abnormal high temperatures, as it typically retreats southward in October [2] - Two cold air masses are expected to arrive next week, with the first weak cold front anticipated to bring some rain and gradually reduce high temperatures in the region [2] - A stronger cold front is expected around October 18, which will likely bring more significant rainfall and lower temperatures, potentially ending the prolonged high-temperature period in Zhejiang [2]