Many of the California home ARE built with concrete tile roofs and stucco walls, but they still burn up!
The tragedies from the Bel Air Fire, Oakland to the current fires has confirm what I know is the major reason why it happens or how it can be prevented.
It is obvious to everyone that cement/tile roofs and stucco / masonry walls are the way to go in high fire prone areas. What is missing is how to fireproof WINDOWS! When adjacent houses or hills are on fire, the radiation goes right thru the glass and ignite curtains and widow coverings. I think a reflective coating on glass will prevent some of the radiant heat from igniting the interior. If homeowners could cover all the windows with cement board or stacking concrete block before fleeing the scene the home will be a lot safer.
Other things to consider is landscaping, eave and facia construction, hillside location, brush clearance, roof sprinklers, masonry propertyline walls and zoning regulations.
The next topic will be HILLSIDE FLOODING and MUDFLOW, that will come next.