I suppose this needs its own thread.
There's not much we can do about any of this except be prepared. A satellite phone, police scanner, go bag, and just being somewhere off the grid might boost your odds. I'm shielded by several mountain ranges at the moment in an out of the way area. A good idea might be to have a friend with a doomsday bunker (think 10 Cloverfield Lane with John Goodman). Or if you have a ocean-worthy vessel you could sail out to sea for a while.
But other than some ideas to survive, there's not a lot to say.
Link to a guide on how to prepare for nuclear war: