暴雨、大暴雨，要来了！一地紧急通知：停课，非必要不外出！

Core Points - Central Meteorological Observatory issued a yellow rainstorm warning, predicting heavy rainfall in several regions including Henan, Shandong, Anhui, Jiangsu, Hubei, Shaanxi, and Sichuan from September 11 to 12 [2] - Zhengzhou city has initiated a level four emergency response to flood prevention due to expected heavy rain, with significant rainfall forecasted for September 11 [4][7] - All non-boarding primary and secondary schools in Zhengzhou will be closed on September 11, and citizens are advised to avoid unnecessary outdoor activities [7] Weather Forecast - Heavy to torrential rain is expected in parts of Henan, southern Shandong, northern Anhui, northern Jiangsu, central Hubei, southern Shaanxi, and central and southern Sichuan, with rainfall amounts between 100 to 180 millimeters in some areas [2] - The main period of heavy rainfall in Zhengzhou is forecasted from 11 AM to 2 PM on September 11, with maximum hourly rainfall reaching around 30 millimeters [4] Emergency Measures - Government and relevant departments are advised to prepare for flood prevention, including traffic management and public safety measures [3] - Citizens are urged to avoid low-lying areas and locations prone to flooding, such as underpasses and underground facilities [6][7] - Construction sites and outdoor work should be suspended during the heavy rain period to ensure safety [7]