What is the meteorological grade of forest fire risk?

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Fire risk rating for short. According to the main daily fire risk factors such as temperature, humidity, wind power, precipitation, water content of combustible materials and continuous drought, a specific method is used to calculate. At present, China's forest areas generally adopt five-level system: level one-non-combustible; Secondary flame retardant; Grade 3-combustible; Grade 4-Flammable; Level 5-Intense combustion. The fire risk grade is calculated by the meteorological department or the single-point forecast station according to the daily observation of fire risk elements and weather analysis during the fire risk period, and then the fire prevention headquarters is notified in time, and broadcast by radio stations and television stations. The work department of the fire prevention headquarters shall take effective preventive measures according to the fire risk level.

Source: China Forestry Dictionary, 142. Supplement: Fire weather is divided into five grades.

The occurrence and development of forest fires are closely related to meteorological conditions, and forest fire risk is an important measure to measure the possibility of forest fires and the difficulty of their spread.