12小时超500毫米降水量！南方强降雨还将持续，北方降雨何时来

Core Points - Southern China is experiencing severe rainfall, with some areas in Guangdong recording over 500 millimeters of rain in just 12 hours, indicating extreme weather conditions [1][3] - A significant heatwave is affecting over 10 provinces, with temperatures exceeding 37°C in six provinces, and some areas in Hebei, Henan, and Shaanxi reaching or surpassing 40°C [1][12] - A cold front is expected to bring relief from the heat starting on the 21st, leading to increased rainfall in the southern regions [1][12] Rainfall Summary - Areas like Guangdong and Guangxi are experiencing intense rainfall due to the influence of subtropical high pressure and warm moist air, resulting in short but heavy downpours [3] - Specific measurements include 411.5 millimeters of rain in 6 hours and 574.8 millimeters in 12 hours at a weather station in Guangdong, surpassing the annual rainfall of Beijing [3] - Future forecasts predict continued heavy rain in parts of Jiangxi, Zhejiang, Fujian, Guangxi, and northern Guangdong [5][6] Heatwave Summary - The northwest and northern regions are facing a significant heatwave, with temperatures in areas like Shaanxi, Henan, and Shanxi reaching 37°C to 39°C, and some locations potentially hitting 40°C [12][11] - Major cities such as Xi'an and Taiyuan are expected to challenge their historical May temperature records with highs around 39°C and 38°C respectively [11] - The heatwave is projected to affect multiple provinces, including Xinjiang, Gansu, Ningxia, and others, before a cold front brings rain and cooler temperatures [12][14]