北方“桑拿天”还要“蒸”多久？

Core Viewpoint - The recent high temperature and humidity in northern China are attributed to the northward movement of the subtropical high pressure, leading to discomfort among the public due to the "sauna-like" weather conditions [1][4]. Group 1: Weather Conditions - Northern regions are experiencing high temperature and humidity, with relative humidity reaching over 85%, and even 100% in Beijing on July 3 [1]. - The typical summer period of discomfort in northern China usually occurs from late July to early August, but this year it has arrived earlier due to the strong northward shift of the subtropical high pressure [1][4]. Group 2: Comparison with Southern Weather - The term "returning to southern weather" is inaccurately applied to the current conditions in northern China, as this phenomenon typically occurs in early spring with cold air still moving south [3]. - The current high temperature and humidity in the north differ from the "returning to southern weather" in terms of time, causes, and phenomena, making "sauna weather" a more appropriate description [3]. Group 3: Future Weather Predictions - The high temperature and humidity are expected to persist for at least another week, with potential short-term relief from rain but overall continued discomfort due to the influence of warm, moist air [4]. - Experts warn that high temperature and humidity can impair the body's ability to regulate temperature, increasing the risk of heat-related illnesses, particularly for vulnerable populations [4].