If Nuke hits in San Diego & I'm Safe in LA should I still get the Hell out Fearing What the Governme

What do you suppose will happen if just a chunk of California plops into the pacific ? the mass exodus would over whelm the country, and every relative living out side California would be obligated to take them in.
Personally , if a chunk fell off I'd be relieved as it likely lightened the pressure off the rest of the state .
Volcanic activity however is a whole nother problem .
Nuclear attack is any body's guess . we've been fearing that since it's invention . how big , location, weather conditions, economic conditions ,,too much comes into play .
You have to know that military bases are going to protect them selves as the first line of defense.
Any cities are a secondary concern being the greater population . Problem with that is with out the farm land, no one survives .
No matter where you live there is going to be a problem.
Question to me is," can I make a difference in the midst of that problem ?"