I have lived along the atlantic coast and in tornado alley, and the longest I have ever been without power was about 3 days. I saw that movie a while ago and I dont think it could ever be that bad, unless there was another stresser, like riots or some sort of an epidemic, or whatever, you get my drift. Anyway, a fire arm of some sort would be good for a situation like that, but I dont see this being an issue, most power companies dont like having their grids down for too long!

Garrett
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On occasion of every accident that befalls you, remember to turn to yourself and inquire what power you have for turning it to use. - Epictetus