Summary of Key Points Core Viewpoint - The northern region of China is experiencing its first heatwave of the year, with temperatures expected to reach or exceed 40°C in several areas from May 19 to 22, while the southern region will continue to face heavy rainfall, raising concerns about secondary disaster risks [1][2]. Group 1: Northern Heatwave - The first heatwave in the northern region is set to impact areas such as Northwest, North China, and Huanghuai, with temperatures potentially reaching 40°C [1][2]. - Key affected areas include Ningxia, Shaanxi, Henan, Shandong, Shanxi, and northern Hubei, where temperatures will exceed 35°C, with some locations experiencing highs of 37 to 40°C [2]. - Shaanxi is identified as the core area for this heatwave, with the longest duration of high temperatures lasting 3 to 4 days, and some places may reach historical temperature extremes [2]. Group 2: Southern Rainfall - The southern region continues to experience a rainy pattern, with heavy rainfall expected in areas such as Jiangnan and South China, including potential localized heavy rain or torrential downpours [3]. - The Central Meteorological Observatory forecasts significant rainfall in regions like southern Zhejiang, southeastern Jiangxi, central and northeastern Guangxi, and western Guangdong, with some areas facing heavy rain [3].

Core Viewpoint - The majority of Guangxi is experiencing severe drought conditions, classified as "extreme drought," due to significantly reduced rainfall since March [1] Summary by Relevant Categories Weather Conditions - Since March, rainfall in Guangxi has been less than half of the normal levels for the same period, with many areas in April receiving less than 20% of the usual rainfall [1] - Some regions have recorded rainfall levels so low that it is nearly equivalent to no rainfall at all [1] Temperature and Evaporation - Recent high temperatures in Guangxi have accelerated evaporation, worsening the drought situation [1] Future Outlook - There is a forecast for frequent rainfall in the coming days, which may help alleviate the drought conditions [1] - However, there is a warning for potential heavy rainfall in certain areas, which could lead to sudden flooding and secondary disasters [1]