Meteorology and Fire

In the weather forecast program of TV stations, we can sometimes see the forecast of fire danger level. Do you know the relationship between fire and weather?

The relationship between meteorological conditions and fire is very close. The ignition points of various combustible materials in nature depend on changes in meteorological conditions in the atmosphere. For example, the size of humidity, the temperature, the amount of precipitation, the strength of wind, etc. It is generally believed that sunny days with few clouds, high temperatures, and strong winds reduce the humidity of the air and the water content of various combustibles, which is the most prone to fire.

Weather conditions affect fires in many ways. The key factor is air humidity. In general, when the air humidity is less than 60%, there is a possibility of fire; and the higher the temperature, the faster the moisture evaporation rate of the combustibles, the items are dry, and the fire is prone to occur. The magnitude of wind force is also closely related to the occurrence of fire. The wind can not only dry the items and help to burn, but also can provide the fire source with sufficient oxygen supply to accelerate the combustion after the fire.

The number of fires and the degree of damage are the most in winter and spring, the most serious, followed by autumn and the least in summer.

Due to the close relationship between fire and meteorological conditions, meteorological scientists and technicians used the influence of meteorological conditions on fire to develop a fire risk forecast. As the possibility increases, we must maintain sufficient vigilance, strengthen the management of outdoor open flames, irregular fires, etc., take precautions and reduce fire losses to a minimum. Practice has proved that the fire risk forecast will effectively reduce the occurrence of fire and play the role of "prevention first, combination of prevention and elimination".