Based on the historical record, i am primarily concerned with fires and earthquakes, facts of life in California. EQs, fortunately not an everyday occurrence, could be a big disrupter, messing up infrastructure and transportation and life in general for a significant period. Staying put is probably the best option, most of the time

Fires are relatively easy - grab your stuff and go. Of course, fires often occur in the aftermath of big quakes -???

You can't predict the future with any degree of certainty. I find a lot of the notions presented here on ETS very helpful and sensible in preparing to face the unknown.