I think most commercial/semi commercial operations would have to rely on others. You would know better than me.
We have a semi-local option (60miles away) and then the western New York option (900 miles) I would hope the folks in CA had such plans in place. Hence my comment to Tom on how much notice would they get.
As as a side note, we used to take in horses being evacuated from hurricane zones, but had too many people that just abandoned them afterwards. I get that they may have had larger issues to deal with, but now we only provide harbor for people we know.