Group 1 - The recent high-temperature weather in Henan has been severe, with temperatures exceeding 37°C across most of the province, and some areas reaching as high as 43°C [1] - The primary cause of this heatwave is the prolonged control of the western Pacific subtropical high, leading to strong solar radiation and minimal cloud cover [1] - Rainfall began on August 8, providing some relief from the heat, but high temperatures are expected to return starting August 12 as the subtropical high re-establishes itself [2] Group 2 - The current humid and hot weather in northern China is linked to the northward movement of the western Pacific subtropical high, which is expected to persist for some time [3] - Although recent rainfall in regions like Hebei and Tianjin has temporarily reduced humidity, the ongoing influence of warm and moist air from the southwest will replenish moisture levels quickly [3] - High humidity combined with high temperatures can impair the body's ability to regulate temperature, increasing the risk of heat-related illnesses, particularly for vulnerable populations [3]