I suppose they'll be left in the light once the bombs start hitting, though.
In Gurori our Nuclear Protocol is as follows.
First and foremost, all programming on all GBC channels are interrupted by this broadcast.
A similar, pre-recorded message is broadcast across all GBC Radio stations.
At this point, the Imperial Family and important government figures have been evacuated to a classified location.
Civilians are evacuated to humongous vaults that can withstand nuclear war. They are located under most major cities and are completely self-sufficient, capable of sustaining up to one million people for many years. Due to how huge they are, every vault has it's own rail network to allow inhabitants to feasibly travel across the large distances.
However, Civilians can alternatively evacuate to fallout shelters, or really any construct that can withstand the fallout. You better hope that you have all the right supplies, though.