What are the natural causes of forest fires in Chengxian County, Gansu Province?

Mainly caused by rainfall, forest density and other factors. Forest fires in Australia have basically burned all over Australia, leaving countless animals homeless. Finally, the fire in Australia went out, and a forest fire broke out in Chengxian County, Gansu Province. Forest fires are not only caused by crazy or unintentional human beings, but also partly by natural factors.

For example, when the weather with high temperature and high fever comes, in some dry areas, with the increase of surface temperature and the full-day exposure of the sun, some combustible materials on the ground will eventually spontaneously ignite, thus causing forest fires. And these will also cause different degrees of fire with different combustible materials. For example, the most flammable are dry hay and some tiny needle-like dead leaves, while the fallen leaves of conifers, camphor trees and eucalyptus trees contain a lot of oil and are also relatively flammable. Under the joint action of the sun and the surface high temperature, these leaves spontaneously ignited and developed into forest fires under the induction of drought.

For another example, sometimes, when it rains in summer, there will be heavy lightning. The towering trees in the forest are undoubtedly the best lightning rod. In this way, some huge lightning will hit these towering trees, and then the trees will have a burning reaction, which will then burn a large forest and become a forest fire. This kind of situation generally appears in rainy and thunderous areas in summer, which is really inevitable.

And volcanic eruptions. Crustal movement causes volcanic activity, which will spit out magma, which will ignite trees and cause forest fires. However, once a volcano erupts, it will spew out a lot of magma. By then, I'm afraid not only forest fires, but the whole city will be submerged under magma.