[Ditter]

I know that forest fires are very hot. I heard a story about some people trying to get out of a fire in their car & the tires melted. I have seen people with a garden hose wetting the roof down. But the area around SanDiego looks like low brush. I think in an area like that when the sparks are blowing in from far away that a roof sprinkler system would help.

[Tijeras_Slim]

I live in a high fire danger area. I'd stay and fight (my neighbors and I have put out several brush fires in the past couple years), but I'd run like crazy when it was time. I'd wager that many of these folks don't have a "defensible space" around their homes - about 30 feet with no or few combustibles.

[Free Trapper]

Lawn sprinklers,oscillating or not,might help on the roof in some situations.

I use them to cool campers and critter pens when it gets hot.