Ever see the Kevin Costner movie "The Mailman"? Circa turn-of-the-nightmare following a continental US/world disaster. Something like that for the survivors. Or Kurt Russell's "Escape From New York"? Gang violence. Or "Dawn of the Dead"...or "I am Legend". Dang, I watch too many DVD's. I need to go to the range more often.
History channel suggests when the side of the Azores Islands drops off due to volcanic activity that the resulting Mega Tidal Wave sweeping westward will inundate Florida with a 100-foot tall wave of Ocean. Surviving that will be the stuff of Legend. You guys can line up for cheap "waterfront" property deep in the hearts of GA, AL, MS, AR, OK and parts of TX.
The human condition already "survives" hurricanes, tornados, floods, heat waves, drought, famine, locust, other inhumane human to human interaction, and a host of other maladies. Perhaps, before the BIG ONE takes us out, assuming we can tell when that event is likely, we will unleash our nukes on the Diapper Heads, N. Koreans, and the "Usual Suspects" in the hopes that We The People will be the survivors to inherit the Earth. WTH, why not?