The warning of "rainstorm blue + lightning yellow" is high! Xinhua News Agency, June 18, Shanghai Central Meteorological Observatory issued a lightning yellow warning signal 06:35 on June 18, 2023: it is expected that lightning activities will occur in this city within 24 hours, which may cause lightning disaster accidents, accompanied by 30-50 mm of short-term heavy precipitation per hour, please pay attention to prevention. The Shanghai Central Meteorological Observatory issued a blue warning signal for rainstorm at 06:52 on June 18: under the influence of the Meiyu belt, it is expected that there will be short-term heavy precipitation of 30-50 mm an hour in the city in the next 24 hours, please pay attention to guard against urban flooding caused by heavy rainfall, and do a good job of drainage and waterlogging prevention in low-lying and flood-prone areas.