Houses almost all use wood framing. Rarely they use steel framing, which is more expensive and provides worse insulation. None use concrete or masonry because it is illegal to build a house that will collapse during a M7-8 earthquake. Like Japan, construction style in the western US is driven primarily by the requirement to be extremely seismic resistant, since that is a predictable and unavoidable risk.
In Southern California, it is typical to have tile roofs and stucco exteriors, which helps protect against the embers that will rain on your house during a major wildfire.
Most houses in the US are made of wood. In Los Angeles they often have tile/concrete roofs, but I've read that in a situation like this the problem is the vents under the edge of the roof that lead into the attic: if anything burning gets through there, the house is toast.
Source: used to live in a Los Angeles hilly suburb. If the fires get to where I used to live, that house will definitely burn despite having a cement tile roof.
Insurers require ember resistant vulcan vents and the like now. It’s a relatively minor upgrade for most homeowners since its just a mesh over the vent.
No, vulcan vents only help when the exterior is capable of resisting the fire. These winds threw fist sized pieces of burning wood for hundreds of feet which is much harder to defend against.
All homeowners I know here have already had them installed over the last five years because of fire insurance inspections but I don’t know how representative my sample is.
Considering that winds both made the spread a lot further, faster and moving around fuel (trees/wood/material blowing around and ending up on streets and whatnot), it sounds unlikely any 1 solution would have prevented this.
The house was framed in 2x4 which is standard in most of the US. We did have modern fire resistant siding and roof tiles, but this was leagues beyond what any of those materials are designed for. It melted most of the steel around the property. Thank you for the kind words.
Sorry for your loss.