Been there, done most of what they have suggested! Now, if I could just get my grown children to pay a bit of attention, and prepare a bit!
I hope that younger kids aren't having nightmares. Remember how scared many people were when the TV film The Day After came out in 1983? IMDB has this bit of trivia
ABC set up special 1-800 hotlines to calm people down during and after the original airing.