The subject of how we would get away often comes up when we speculate about what we would do in the event of a nuclear assault.
Also, at what distance would we be safe?
Getting out of the way of a nuclear detonation is very improbable, but have you ever been curious about how far the blast travels?
The "blast radius" is estimated to be between tens and hundreds of kilometres on Wikipedia.
Although, more accurate computations are feasible.
AsapSCIENCE, a YouTube channel dedicated to popular science, created a movie in which they simulate the effects of a nuclear explosion.