中央气象台8月18日06时继续发布暴雨蓝色预警： 预计，8月18日08时至19日08时，广东南部和西部、广西中南部、海南岛西部以及内蒙古河套地区和东 北部、陕西北部、山西北部、北京南部、天津南部、河北东部、甘肃西南部等地部分地区有大到暴雨， 其中，内蒙古河套地区、广西南部沿海等地部分地区有大暴雨（100～120毫米）。上述部分地区伴有短 时强降水（最大小时降雨量20～50毫米，局地可超过70毫米），局地有雷暴大风等强对流天气。 防御指南： 1.政府及相关部门按照职责做好防暴雨准备工作； 2.学校、幼儿园采取适当措施，保证学生和幼儿安全； 3.驾驶人员应当注意道路积水和交通阻塞，确保安全； 4.检查城市、农田、鱼塘排水系统，做好排涝准备。 中央气象台8月18日06时继续发布高温黄色预警： 预计8月18日白天，黄淮大部、江淮、江汉、江南中北部、陕西关中、四川盆地、新疆吐鲁番盆地和南 疆盆地东部等地的部分地区有35～39℃的高温天气，其中，陕西关中、重庆、湖北、湖南北部、安徽南 部、江西北部、浙江中西部、新疆吐鲁番盆地等地局地最高气温可达40℃以上。 防御指南： 1.有关部门和单位按照职责做好防暑降温准备工作； 2 ...

Group 1 - The article highlights the issuance of a national high-temperature health risk warning, with several regions experiencing extreme heat, prompting a red alert level for health risks in areas such as Jiangsu, Shandong, Henan, Anhui, and Heilongjiang [1] - There has been a significant increase in the demand for heat-relief medications, with a 126% month-on-month growth in related orders on the Meituan Buy Medicine platform, indicating a rising consumer focus on health during extreme heat [1] - Popular heat-relief products include Huoxiang Zhengqi Oral Liquid, which ranks among the top-selling items, along with other products like cooling oil and honeysuckle extract, reflecting consumer preferences for effective cooling solutions [1] Group 2 - Meituan Buy Medicine has launched a summer high-temperature subsidy program, providing various health services including 24-hour access to medications and expert consultations, catering to the increased health needs during the summer [4] - The platform boasts over 15,000 online pharmacies, ensuring a robust supply chain for summer medications and services, which is crucial during high-temperature periods [4] - Medical professionals emphasize the importance of immediate care for heat-related illnesses, indicating a growing awareness and need for health services during extreme weather conditions [4]

Group 1 - A significant heatwave is affecting northern China, with ground temperatures exceeding 50°C on May 20, particularly in regions like Shanxi and Ningxia, where temperatures reached 71.1°C, 70.3°C, and 70.1°C respectively [1] - The extreme temperatures are attributed to clear skies and enhanced solar radiation, leading to rapid warming in Henan and Hebei, compounded by descending air currents from the Taihang Mountains [3] - The ongoing hot and dry weather has resulted in drought conditions in various northern regions, impacting winter wheat production during a critical growth phase [3] Group 2 - Experts predict that the high temperatures will not last long, with a significant drop expected starting from May 22 due to the influence of cold air and precipitation [4] - The temperature in northern regions is anticipated to decrease gradually, with some areas experiencing a drop of over 15°C [4] - A heat prevention guide emphasizes the importance of hydration, avoiding outdoor activities during peak heat, and maintaining a cool environment to prevent heat-related illnesses [5]