Most of the older houses in the suburbs around Perth, WA are double brick, with, yes, wooden rafters & usually trim.
They are not too bad for fire safety, but they will burn, if the fire gets inside.
In the older forestry areas, many homes were built with "weatherboard"(for non Oz folks, they are "boards" specially shaped to overlap neatly).
They are, in many cases, very neat & picturesque, but after 80--100 years of sitting there drying out, they are a bushfire's "favourite food".
In many cases, back in the day, the frames were retained, but reclad in (aiiieeee!!!
) asbestos.
"Asb" or "fibro" is fire resistant, but has a habit of shattering if exposed to enough heat for long enough.
Meanwhile, back in the city, increasing numbers of homes are made, using softwood framed "brick veneer" .
A few years back,there were a lot of steel frames being built, but the softwood ones seem to be in the majority now.
In the "hills" east of the city, there are some very nice properties nestling amongst quite large eucalypts.
To add insult to injury, many are either all wood construction, or have very large polished wood feature walls.
For us peasants, the new houses on "postage stamp" blocks (I don't have one of them) have about a hand's width between them, so if a fire starts a one end of a group of them...
Some of them are made of premade concrete panels & assembled on site, so should be pretty good, but I
don't know whether they have compromised that with other materials added later.