Not popular, but suicide is an option if you can see the bomb's impact close enough that you know you will either be hit by a heat wave, fallout, or scavengers after the fact.
International Level: Specialist / Political Participation: 37 3.7%
Personally, if I knew there is going to be a bombing beforehand, I would've built a fallout shelter to hide in or bought an airplane ticket out of the city. But, if it's immediate, I would run into the attic and hope for the best.
International Level: Politics 101 / Political Participation: 2 0.2%
We rest Do You Know What To Do In A Nuclear Attack? to share caption from past times:
Today is: 23rd March (GMT), in history on the 23rd of March, 1973 AD the following event happened:
Yoko Ono is granted permanent residence in US