Be prepared for another Blast

Most likely, a nuclear attack will not be a singular event. Be prepared for another strike or strikes by enemy nations, or an invasion by the attacking party.

Be prepared for another blast. Keep your shelter intact, unless the materials used are absolutely necessary for survival. Collect any excess clean water and food that is available.
However, if the attacking nation does attack again, it will likely be in another part of the country. If all else fails, live in a cave.