非必要不外出！北京发布红色预警

Core Viewpoint - Beijing has initiated a Level 1 emergency response for flood prevention due to expected heavy rainfall, urging citizens to take precautions [2][4]. Group 1: Weather Alerts - On August 4 at 13:00, Beijing upgraded to a red rainstorm warning, predicting strong rainfall starting in the afternoon, with the heaviest rain expected from 18:00 to 05:00 the next day [2][4]. - During this period, some areas may experience rainfall exceeding 150 millimeters within six hours, with isolated spots potentially exceeding 200 millimeters [4]. Group 2: Emergency Measures - The city has implemented a Level 1 emergency response, advising citizens to avoid unnecessary outings and to be cautious of waterlogged roads [4][5]. - Organizations are instructed to minimize staff attendance unless essential for city operations and public services, while schools and training institutions are to halt all in-person activities [4][5]. Group 3: Risk of Geological Disasters - A geological disaster risk orange alert has been issued, indicating a high risk of landslides, mudslides, and collapses in specific districts from August 4 to August 5 [8][9]. - Areas such as the central part of Fangshan, eastern Mentougou, and parts of Haidian and Changping are particularly at risk [8][9].