The main cause of a fast-spreading forest fire is when the leaves at the top of the trees catch fire. Israel’s Fighting Treetop Fire (FTF) is developing algorithm-controlled laser beams for helicopters or trucks to remove leaves, thin branches and pine needles off treetops in the path of a forest fire.
https://www.israel21c.org/new-laser-solution-could-slow-spread-of-forest-fires/