I think that was Mayor Garcetti and he ordered it for LA County.
No news here of Gov Newsom doing anything statewide.
It’s front page on yahoo news
!WOW You are correct. I just saw it on Fox. California on stay at home.
https://www.latimes.com/california/story/2020-03-19/gavin-newsom-california-1-billion-federal-aid-coronavirus