Is the fog red warning off?

The fog is red and classes are closed.

Fog red warning signal is an early warning signal made by the meteorological department through meteorological monitoring before the arrival of fog, reminding people to guard against the influence of fog, and the transportation department tries to reduce traffic accidents caused by fog. Fog red warning signal is the highest warning signal of fog.

The suspension of classes in air pollution schools is a measure stipulated by laws and regulations in some countries and regions. Especially in some areas with high air pollution and serious environmental problems, the government will decide whether to suspend classes according to the local air quality index (AQI) and other related factors.

According to the classification method of Technical Regulation of Ambient Air Quality Index (AQI) (HJ633-20 12), the relevant provisions of the National Classification Standard for Early Warning of Heavy Pollution Weather by the Ministry of Ecology and Environment, and according to the results of air quality forecast, the early warning of heavy air pollution is divided into three levels, from light to heavy, namely yellow warning, orange warning and red warning.

National defense guide

1. Relevant departments and units shall do a good job in anti-fog emergency work according to their duties.

2. Relevant units shall take traffic safety control measures in a timely manner in accordance with industry regulations, such as airport suspension of aircraft take-off and landing, temporary closure of highways and temporary suspension of ferries.

3. Drivers should take preventive measures in foggy days according to the regulations on driving in foggy days, adopt reasonable driving methods according to environmental conditions, and find safe parking areas as soon as possible.

4. Don't engage in outdoor activities.

5. The foggy weather causes low visibility near the ground, which affects people's travel, production and work, and it is particularly easy to cause vicious traffic accidents. Therefore, meteorological, public security, transportation, construction and other departments should cooperate closely to implement the meteorological information release system, timely and accurately release early warning information and traffic control measures through television, radio, internet, newspapers and other media and mobile phones and electronic display screens, and effectively strengthen the response to sudden heavy fog.

The above contents refer to Baidu Encyclopedia-Fog red warning signal.