Normally it is the southern part of the state that burns because it is much drier than the north. Our fire season in the south usually starts with hot, dry Santa Ana winds that come in off the desert blowing anywhere from 25mph to 75mph. Many of the local fires in the southland here are caused by people, some accidentally, some on purpose. Mountainous areas with steep canyons create their own wind tunnels that are unpredictable. Winds will carry embers causing spot fires to pop up 1/4 - 1/2 a mile away from where the main fires is located. In other words the fires can leap frog that distance at the snap of a finger. They haven't determined the cause of the Goleta (Santa Barbara) fire, however, that area is quite rugged and has not burned since 1955.
This fire season has been unusual because most of the fires are burning in the northern part of the state. In mid June they had some very unusual thunderstorm activity with over a thousand lightening strike caused fires. If you have ever flown over the state you would realize the extent of the problem as so many of these areas are inaccessible except for air-drops and fire jumpers. Heavy fuel, drought conditions etc. all add to the problem.
Since June 20th, the fire stats are:
Total Fires at Peak: 1,781
Total Fires Contained: 1,451
Total Active Fires: 330
Total Acres Burned: 597,910
Personnel Committed: 19,232
Fire Engines: 1,519
Hand Crews: 414
Dozers: 295
Water Tenders: 411
Helicopters: 95
I just read that British Columbia is sending in crews to help with the fires.