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%