I did a very minimal prep a few weeks before the lock downs started, mostly things we already use and things the kids like. Helped that first few weeks when people were panic buying.<p>Definitely need to do more thinking on different scenarios (shelter in place, get out of town, etc).
I think if I lived in California I’d have a bug out bag. Everyone expects to need to run out on the street during an earthquake at some point, and it could be your building that collapses.