Of course, in the minutes waiting for the bomb to detonate one can only shelter and hide, the guide also mentions this. The guide is more for how localities can mount rescue operations within the first 12-24 hours after detonation and before Federal Aid would arrive.

What is most eye opening is that the guide recommends for first responders that zone around ~ 1 mile from ground zero of a 10 kT nuclear explosion has the greatest lifesaving potential through early responder actions.