Number of Forest Fires refers to the number of fires in forests, woods and woodland outside of the downtown areas of cities. In light of the area plagued by fires and the number of casualties, forest fires can be categorized into usual forest fires, relatively larger fires, serious forest fires and extraordinary serous forest fires: 1). Usual forest fires: the destructed forest area is less than 1 hectare, or the fire erupts in other woodland, or the number of deaths is no less than 1 but less than 3, or the number of seriously injured persons is no less than 1 but less than 10 persons. 2). Relatively larger forest fires: the destructed forest area is no less than 1 hectare but less than 100 hectares, or the number of deaths is no less than 3 but less than 10, or the number of seriously injured persons is no less than 10 but less than 50 persons. 3). Serious forest fires: the destructed forest area is no less than 100 hectares but less than 1000 hectares, or the number of deaths is no less than 10 but less than 30, or the number of seriously injured persons is no less than 50 but u less than 100 persons. 4). Extraordinary serious forest fires: the destructed forest area is no less than 1000 hectares, or the number of deaths is no less than 30, or the number of seriously injured persons is no less than 100 persons.