I work with CHP helicopters as part of our fire district's rescue team. We pull a half dozen people a year off of one of the local trails (sometimes as "recovery"). Most of these are via helicopter. There are two helos for a huge area - Yolo county down to Santa Cruz county. By acreage it's a lot bigger than LA.

My point is, two small helicopters are more than enough to do that job as a side-gig from all the other CHP work they do.

Also, Cal Fire has its own air wing. LAPD helicopters are not equipped for firefighting.