They've actually stopped permitting new builds or rebuild of burned houses in Santa Ana mountains since last year's airport fire.
We were looking to buy a house in Orange or Anaheim Hills because those areas are comparatively affordable. But after the airport fire we steered clear. I took a fire insurance quote on an Orange property, their model says the fire risk is 4 on a scale of 15, but they treat it like 10 because the variance is too high.