Shanghai issues a blue rainstorm alert signal for the central urban area, and the city's flood prevention command center initiates a level four response action against flooding and typhoons in some central urban areas.

In the next 6 hours, Huangpu District, Jing'an District, Hongkou District, and Yangpu District are expected to experience short-term heavy rainfall with hourly precipitation of 30-50 millimeters. The Shanghai Meteorological Observatory issued a blue rainstorm warning signal for the central urban area on July 21, 2026 at 15:35. The city's flood control headquarters has decided to simultaneously initiate a Level IV response action for flood control and typhoon prevention in the central urban areas such as Huangpu District, Jing'an District, Hongkou District, and Yangpu District.