For people who a) have this as a serious option, and b) are seriously considering it, there's almost certainly still time to do something unless escalate extremely quickly.
The real question is whether you'd want to survive anything that would require that bunker to live through.
This is a real thought I've shared with friends. Though it's incredibly morbid, I am thankful I live close enough to a city center that I will be mercifully unmade in an instant should the bombs drop.
The real question is whether you'd want to survive anything that would require that bunker to live through.