I'd expect most activity to be on the PVARC linked system, which is the countywide system that ACS/ARES uses. The old countywide repeater, SMRA Red Mountain, has been quiet and is not holding a net. Since the fire has pushed down into Los Angeles county, LA-DCS should be having activity. I am not monitoring either system much (about six feet of coax short of success), but I heard activity on PVARC yesterday.