Air warning level color

The color signals of air early warning are blue, yellow, orange and red from low to high.

On August, 2004 16, China Meteorological Bureau issued the Trial Measures for Issuing Early Warning Signals of Sudden Meteorological Disasters. Each color represents a different degree of early warning, which is easy to distinguish. Meteorological early warning signal is an upgrade on the basis of forecasting and warning disasters, and it is the early warning information released to the public by meteorological stations affiliated to competent meteorological departments at all levels.

Air pollution is divided into four levels of early warning. According to the degree from light to heavy, heavy air pollution is divided into four levels of early warning, three levels of early warning, two levels of early warning and one level of early warning, which are marked with four colors of blue, yellow, orange and red respectively, and the first level of early warning (red) is the highest level. Faced with different air warning color signals, people need to take different measures.

Countermeasures in the face of different airborne early warning

1, warning level 4 (blue)

Remind children, the elderly and other susceptible groups to reduce outdoor sports. Advocate the public and units that discharge air pollutants to consciously take measures to reduce pollutant discharge, such as increasing the frequency of sprinkling water and cleaning roads on construction sites; Pollutant discharge units shall take further measures to reduce pollutant discharge.

2, early warning level 3 (yellow)

In addition to health protection reminder measures and suggested pollution reduction measures, compulsory pollution reduction measures should be added, such as increasing the frequency of road cleaning and washing according to the key roads determined by the road cleaning and washing sub-plan during heavy air pollution to reduce traffic dust pollution; Effective dustproof measures such as covering and sprinkling water must be taken to reduce the excavation scale of earthwork construction and building demolition.

Baidu Encyclopedia-Warning Signal of Heavy Pollution Weather