Core Viewpoint - The northern regions of China are experiencing a prolonged rainy season, with significant rainfall expected to continue in various areas, particularly in the Beijing-Tianjin-Hebei region and surrounding provinces [5][6][7]. Weather Forecast - A yellow rainstorm warning has been issued, predicting heavy rainfall from August 27 to August 28 in regions including Liaoning, Hebei, Beijing, Tianjin, and parts of Sichuan, with localized areas expecting extreme rainfall of 100-150 mm [2][4]. - The rainfall is expected to shift eastward, with the heaviest precipitation anticipated in the Beijing-Tianjin-Hebei area, followed by a further eastward movement towards Liaoning [4][6]. Rainfall Statistics - As of August 25, the rainy season in North China has lasted 52 days, significantly longer than the average duration of 30 days, with an average rainfall of 315.5 mm, which is 131% above the normal value of 136.6 mm [5][6]. Contributing Factors - The excessive rainfall in North China this summer is attributed to several factors, including abnormal sea surface temperatures in the equatorial Pacific, a persistent and strong subtropical high-pressure system, typhoon activity, and geographical influences [6][7]. - The subtropical high has expanded northward due to global warming, facilitating the continuous influx of warm, moist air into northern China, which, combined with cold air from higher latitudes, has resulted in increased precipitation [7]. Geographical Influence - The topography of the Beijing-Tianjin-Hebei region, characterized by the Taihang and Yanshan mountain ranges, enhances rainfall through orographic lift, where moist air is forced to rise, leading to condensation and precipitation [7].