I've replied to these kinds of surveys before; at least one was in a "Protect and Survive" spinoff focused on Florida, which tempted me to try an ATL for myself where I chose to go to UF in Gainesville. But in fact I chose no such thing and in September 1983 I was actually in Pasadena CA, as a freshman just a few weeks into my first trimester. (We had trimesters where I went to school, not 'quarters' because there was no summer session, but of similar duration to a "standard" quarter vs semester). Being very very new to the campus (less so than most Frosh, since I spent the prior summer living on campus, but still not very tied to the social structure as of yet) I don't expect any privilege that might be extended to the more important folks of the campus community (quite a lot of them, it was a very prestigious campus) would apply to me save by chance--nor would there have been a lot to do for even the most favored campus bigwigs save evacuating them days before the balloon went up, which is not something I noticed happening OTL. Here presumably there is no extraordinary early warning and things go as OTL until the Soviet missiles start launching. So even the most favored folks on our little campus would be caught at ground zero--it is possible there was some kind of shelter infrastructure I was unaware of, we would not be likely to be a direct hit target nor get a strike dead on by accident, but in all my years there (enough for me to have graduated, though I didn't) I never heard even rumors of such a thing, and we'd be likely to I think.
So bottom line, just another one of most of 10 million southern Californians, among the majority of them concentrated in greater Los Angeles with a dozen or so focused strike targets some of them multiply targeted, surrounded by 500 square miles or so of very flammable urban/suburban zones; any short term immediate survivors of blast, flash, fire and immediate irradiation would be breathing in heavy fallout and full of desperation to get the hell out on very limited and decimated transport arteries.
Oh, someone or other would survive, some by exceeding toughness, others by sheer luck, most of them doomed to die pretty soon from radiation, mostly inhaled fallout as the flash-irradiated would not last a day. A few would hunker down in place and last it out, if they were some kind of prepper, though a lot of them would be targeted by mobs who would dig them out much as a starfish eats a clam--then they'd die in turn.
I am neither tough, nor a prepper, nor connected to be guarded by squads of Marines or gangs or city police/LA county Sheriff deputies (these latter would just be well armed gangs at this point, somewhat decimated to the degree they dared or were foolish enough to attempt to carry out their duties instead of run for it) so I figure I'd be dead within hours if not seconds.
I'm not a big fan of mid-80s WWIII threads by and large you see. I bet my life it would not happen and thank God it didn't. I would not be around to spectate, let alone participate, in any ATL redistribution of the ruins.
Moving the war later into the '80s and even the '90s hardly helps me either, I stayed in Pasadena until the early '90s. Where I went after that might have been more survivable, maybe.
I don't like my odds anywhere I'd want to live though. WWIII with (or without) nukes is something to avoid, not a toy IMHO. Not just for me of course but if asked to make it personal--I don't see any upside to it any way shape or form for anyone.
Nor are we out of these woods yet, and probably never will be.