停课！非必要不外出！郑州紧急通知

Core Viewpoint - Zhengzhou has issued a meteorological risk warning for urban waterlogging due to expected heavy rainfall, prompting the activation of a Level 4 flood emergency response [1][6]. Rainfall Forecast and Risk Areas - The forecast indicates heavy rain and downpours in Zhengzhou on September 11, with the most intense rainfall expected between 11 AM on the 11th and 2 AM on the 12th, with maximum hourly rainfall around 30 mm [1][3]. - The entire urban area of Zhengzhou is classified as a high-risk zone for urban waterlogging during this rainfall event, particularly from the afternoon to night of September 11 [3]. Flood-Prone Locations - Key locations at risk of water accumulation include culverts, underpasses, low-lying areas, underground passages, shopping malls, and parking garages during the heavy rainfall period [4]. School Closures and Public Safety Measures - All non-boarding primary and secondary schools, as well as kindergartens in Zhengzhou, will be closed for one day on September 11 [5]. - The flood control command requires all relevant units to implement preventive measures, closely monitor rainfall developments, and enhance public warnings. Citizens are advised to avoid unnecessary outdoor activities [6].