Having lived in Southern California and experienced five major fires, fires where I can actually see the flames on the hillside I can tell you from first hand experience that brush clearing and fire breaks do help in minimizing the fire damage. I can only speak from first hand experience where I have seen the fires burn brush all the way up to the cleared areas and then stop. These observations and opinions are shared by some friends who are LA City and County fire fighters and fire Captains whose job it is to fight these fires. My opinions are based on first hand experience not information gleaned from the internet.
There is no need to be rude to Jose or Rob.