I live in Pennsylvania, I built a storm shelter in my basement, I took out the windows and blocked them in, I then built a 12X12 concrete block room with a concrete block roof just below the floor joist. Haven't had to use it yet but I know it will survive just about anything. I have it equipped with a propane cook stove, frig, propane heat( vented of course)well water, and shelves for food and supplies along with bunks and a table.Also equipped with tools to dig out if there is a need. And like Sue said, only one trusted neighbor knows its there in case they need to dig me out.