I think it is funny how people think they are going to be completely destroyed in WW3. Maybe that is a common thought process for Europeans, since they are always the ones in the middle. The truth is that most governments realize the need for civilians, even in a country they are fighting. Unless we have another Hitler or Stalin at the helm I don't think it will be as bad as you think. There is more precision in battle now. No one just drops bombs on major cities in hopes of crushing the enemy.
But in the off chance of the worst case scenario, there are two options. Move to the rural areas. Or, move to Africa or South America. Don't move to northern Africa, it is too close. Move to central or south Africa. All of South America is pretty much the safest continent in a WW3 scenario. You only have to map out the possible areas where war will occur and stay away. If you are European and do not wish to move that far, I would also suggest Iceland. Beautiful place and has no enemies.
Places to avoid in WW3:
All of Europe, Russia, China, The Coasts of the United States, India, Pakistan, Korea, Japan, The Middle East. Most think of Europe, but all of these regions will see land grabs while the main powers of the world are distracted.
doomsday-10.ways.the.world.will.end.part.4.nuclear.war.hdtv.x264-w4f.mkv
Check out that video online
..has a US govt expert adviser explaining how HUNDREDS of nukes would be raining down.
NOT ONE or TWO !
The reality is the sun would be blocked out and crops would be dead.
The power infrastructure and food supplies would be gone in a couple weeks..
..long AFTER pure anarchy and Marshall-Law has taken over.
Key strategic points would be hit first then secondary targets and so on.
Which means the US might get hit first but the Canadian's would be probably hit as well as other nuclear allies like France who have their own Nuclear weapons / subs etc.
Experts say a nuke would be set off higher up over the USA because it would set off an EMP attack blast
which would decimate the power across the country.. paralyzing defenses.
THEN they would start hitting targets and each one would be pounded by probably a dozen of them.
All that would start what experts have always warned us about.. a nuclear winter.
Such as what happened about 500 years ago.. when humans reported that the sun went away for about a year and a half.. which triggered dead crops, famine and a million+ dead.
Most of the planet would be dead.. there would be very few survivors.
And the risk is higher than you would think too !
All it takes is 1 accidental launch and the other side would retaliate.
Then we would have a long lasting Nuclear Winter and pure anarchy to contend with.
..if you lived past the nuke's themselves.
Good luck finding any food.