I am not sure the wood framing matters much in this case. The fires are burning houses because the roofs are flammable, or embers are getting in the house through the eaves or a broken window. So in the end you have a completely burned down wood-framed house or a hollow concrete house that is no longer structurally safe.
Have we seen any stone cities burn down lately? Because I haven’t seen London burn down since they replaced all the wooden houses with brick in 1666.