There was a piece that came out about a month after this happened by an Air Force helicopter pilot, thousands of hours, instructor, the whole deal, and he recounts how he came seconds from this happening to him in pretty much the same area.
We visited that area in late September 2019. Had breakfast at Paradise Cove Beach Cafe (Sand Castle of Rockford Files), then drove over the mountains into Simi Valley to the Reagan Library. Sunny as could be at the beach, but the fog up in the Santa Monica mountains was so thick we had to slow way down. I would hate to have been flying in it.