Forest fires are one of the most dangerous categories of storms.Because it could and would say up till 2 to 3 weeks unless someone puts it out but its likely that the whole forest will be on flames or destroyed on average 100,000 forest fires are called and clears 4 million to 5 million acres. most of the fires fuel is trees and grass. forest fires are mostly made from cigarettes or campfires sometimes fight fighters will get under foil blankets for protection.
The site that i used for this information http://environment.nationalgeographic.com/
Some fire end up burns up to 2 forest at the most
Forest fires are more common then tonados
most of the time some people mean to start the forest fire