Mountain fires often occur in forest areas of our country, and some of the causes of the fires are man-made and careless fires; Some are spontaneous combustion fires. In summer, there was a light rain

Mountain fires often occur in forest areas of our country, and some of the causes of the fires are man-made and careless fires; Some are spontaneous combustion fires. In summer, there was a light rain in the forest area. In addition to human factors, forest fires are mainly caused by lightning.

The fallen leaves piled up in the forest, especially the needles with high fat content, slowly oxidize and heat up in the wet state after light rain, but the heat can not be emitted in the piled state, and the temperature rises. The increase of temperature intensifies the heat of oxidation. Such a vicious circle leads to the process from dark fire to open fire, from small fire to big fire, and finally leads to forest fire. In this state, the scorching sun after the light rain accelerated this process.

Not only fallen leaves, but also rags, cotton silk and waste paper. There is spontaneous combustion in the slightly wet state.