To be fair, in big chunks of SoCal, it barely helps to aggressively fight every burning house. The pains of building houses on hills in an ecosystem centered around regular forest fires. :/
Fair enough. Still, fires do occasionally make it into the cities (I'm pretty sure I remember seeing one eat a neighborhood in San Bernardino a few years ago).
Even stone and brick houses have flammable components. Even a completely non-flammable concrete bunker would have survivability issues with ventilation and temperature if surrounded by a forest fire for any significant length of time.
