Weather Impact on Agriculture - The prolonged high temperatures in Hangzhou have led to adverse effects on the Longjing tea trees, with some leaves showing signs of damage such as discoloration and wilting [4][6] - The optimal growth temperature for tea trees is around 20℃, and the current high temperatures pose a risk of water deficiency and scorching [4][6] - Farmers are implementing emergency measures such as irrigation and shading to protect the tea trees from extreme heat [4][5] Meteorological Conditions - Hangzhou is experiencing a record-breaking heatwave, with the highest temperature reaching 39℃ and a total of 29 high-temperature days expected in August [2][3] - The subtropical high-pressure system is expected to weaken, allowing for a brief cooling period with potential rainfall on September 2-3 [2][3] - After the temporary drop in temperature, the high-pressure system may strengthen again, leading to a return of high temperatures [3]