sorry, my first thought was pretty glib.....
It's painful, but will get worse and I would think the first thing to have to let go would be the redwood trees.....or decide that they are more important to you and let everything else go.....Redwoods and grass would go first....
My brother and sister in law live in Sonora and it's the first thing I've told them..."You need to get out of there...now.....not next year or the year after...." They've been there a long time and have been trying to decide where to retire to...if there's a choice, pick a place that gets rain.....that was my first priority.....