Tornado basement prep I just moved from hurricane country to tornado country. Any advice on what I should do to prep my basement? We get about 2-4 tornado warnings per year that require us to head down there. My basement is basically concrete foundation mixed with 'rock wall' style rock at the top which is pretty grimy and crumbling. The ceiling is wooden. There are two small windows to the outside, and the gas furnace and gas water heater are down there. I have already placed manual gas shut off valves on those items. This is a rental, so structural changes are out of the question. 