暴雨+冰雹预警发布！上海市防汛防台三级响应启动

Core Points - Shanghai Meteorological Center issued a blue rainstorm warning, predicting over 35mm of rainfall in the next 6 hours for central urban areas and several districts [1] - The warning was upgraded to a yellow rainstorm warning, with expectations of over 50mm of rainfall in the same timeframe for specific districts [1] - The Shanghai Flood Control Headquarters initiated a level III flood prevention response [1] Weather Alerts - A blue rainstorm warning was first issued, indicating significant short-term rainfall expected [1] - A yellow hail warning was also issued, advising residents to avoid outdoor activities and protect vulnerable outdoor items [1] - The high-temperature yellow warning was lifted, while thunderstorm and strong wind warnings remain in effect [1]