Legal basis: Notice of the General Office of the Shanghai Municipal People's Government on Printing and Distributing the Implementation Opinions on Dealing with the Arrangements for Suspension of Classes in Extreme Weather and Handling Delays; According to meteorological, flood control and other relevant laws and regulations and the Measures of Shanghai Municipality for Implementing the People's Republic of China (PRC) Emergency Response Law, this Municipality has formulated an emergency plan for meteorological disasters such as typhoons, rainstorms, blizzards and road icing that may occur and have a great impact on society and the public. According to the urgency, development trend and possible harm degree of meteorological disasters, the emergency response measures under the first (red), second (orange), third (yellow) and fourth (blue) warning levels are defined. In order to further strengthen the organization and implementation of emergency response measures, strive to build the city's emergency response mechanism to prevent and respond to disasters, avoid and reduce the losses caused by meteorological disasters to people's lives and property safety, and ensure the operation safety of megacities, we now put forward the following implementation opinions on the suspension of classes and the treatment of lost work in response to extreme weather in this city: 1. Scope of application: this city issued red warnings such as typhoon, rainstorm, snowstorm and road icing (hereinafter referred to as "red warning of meteorological disasters", icons and standards).