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.

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.