at least, those 1500 square miles can't burn again... maybe CA need to do controlled burns like FL does (if they don't already do it). IE: Burn dry brush in the forests.
Florida is mostly low rolling hills with the highest point in the state being ~350 feet above sea level. If Florida has a fire in an inaccessible area, it's usually inaccessible due to water, so more of a help to firefighters than a hindrance.
Also, most fires start in grassy areas. The Camp Fire that destroyed Paradise started as a grass fire on federal land before it spread to shrubs and burned through mostly private land. California has almost 8 million acres of shrubs.
The Woosley Fire that burned almost half of Malibu was started on industrial property owned by Boeing and spread through chaparral along the steep Santa Monica Mountains.