Thanks.  Jerry, the folks bordering that canyon are pretty much inoculated from wildfire  issues for a couple years.  If they get through this with no structural damage (fingers crossed) there will be a lot of well deserved kudos.  
Apparently one of the Marine aviation units at Pendleton recently recertified (Cal Fire?) doing water drops.  I haven't seen any Marine helicopters flying this fire but that ability gives SD a lot of depth in airborne fire fighting resources.  
As for origin, apparently the fire started within yards of a high school.  
I have no idea how a fire could start there, no one in CA smokes, especially HS students on their lunch break   