First of all, a forest fire means that it is any uncontrolled fire that occurs in the wilderness. It always causes a great damage on forest. It means “Arson.”
People who commit the guilty of the arson should be sent to prison.
However, a fire happened might cause great damages or deaths and it ruins everything. Forest fires which are sometimes caused on purpose are extensive and take a lot of time.
It is more difficult to extinguish forest fire for firefighters. To sum up, I think, we all know that people who start a forest fire should be dealt with now.