>Mfw most posters itt think a nuclear war will look like a Michael Bay movie
Hundreds of nukes have already detonated in the atmosphere, not counting the other hundreds underground, and nothing happened. Nuclear winter is a scare tactic propaganda story used to manipulate the masses during cold war. If a full scale nuclear exchange happens, the climate would maybe get slightly fucked up for one or two years but not more.
Also look at Hiroshima and Nagasaki. They were destroyed by 1st gen bombs, which were very "dirty" and were creating much more radioactive fallout than modern bombs (which are more efficient, which means less radioactive in general), and ten years after, the cities were completely rebuilt and people were living there without too much issues, except of course cancers.
Of course most large cities will get obliterated since they're counter value targets but erasing New York or San Francisco from the map sounds like a good deal anyway, just don't be an urbanite.
If you're not in the fireball area (generally a few kilometers wide around the epicenter), a good concrete basement and several months worth of food and water will probably be enough to save you, as long as you happen to be there when the bombs drop, and that's the real tricky part. Just don't be outside when WW3 starts.