First looking at weather patterns, it appears that if there is nuclear fallout, where could you want to be? Remember weather patterns start in the West or North West and move across the country and change throughout the year, but always for the most part blow from East to West. So if you live East of the West Coast you could be in trouble if a Western city gets nuked. Then there are the East Winds in CA, which are called the Santa Ana Winds which are hot, fast moving and dry, the worst possible conditions for fires. As we see every few years in the Southern CA mountains.
So then perhaps you might wish to live on the West Coast, fairly good weather all year and the wind blows the other way. But you would want to live far from any major city on the West Coast. Not in LA, Not near the Nuclear Power plants, Not near the Military bases of Pt Mugu, Camp Pendleton or Vandenburg AFB. So where? Probably on the coast between Humbolt, CA and mid state OR. But alas there are huge faults along the West Coast and the OR Coastline is riddled with issues from liquefaction to offshore Tsunami generating Earthquake faults.
San Francisco gets huge Earthquakes as we know and LA is not immune either and neither is the central valley of CA with it’s issues after proof in the Coalinga Fault. Living between the Russian River and OR Coastline near the coast would be okay even with these issues. Also you would not be down wind from any fallout and you are not a target. Safe in that you have fish for food and lumber for heat and no need for much of anything like power, surrounded by capable woods people.