What does the orange warning of heavily polluted weather mean?

Early warning of meteorological disasters. When the predicted daily average value of AQI is greater than 200 and lasts for more than 3 days, and the high-level warning conditions are not met, an orange warning of heavy pollution weather is issued. During the orange warning period of heavy polluted weather, the government and relevant departments will take measures to deal with the polluted weather, including restricting high-emission vehicles on the road, prohibiting open-air barbecues, stopping building demolition and rural housing construction, and strengthening the supervision of industrial pollution sources. These measures are aimed at reducing the emission of air pollutants and protecting public health and the environment.