Lots of fires in the last few days. Too many to count for natural causes
Arson?
Some might be. Also “arcing” power lines, careless smokers, sparks from power tools, etc.
Usually brush fires get put out pretty quickly, but its been really windy, and that makes it harder.
California nut cases at large.
Embers ride on the wind. It’s the biggest cause of fires spreading.
Strong Santa Ana Winds. Humidity in single digits. Lots of scrub brush for fuel.
Little sparks or fires that would normally die out can turn into an inferno in these conditions. Road flares set off the Canyon 1 Fire in OC about a month ago.