I recommend the basement. I also recommend that in addition to food and water you make sure that you have a weapon. If something were to happen there are people who will try to take advantage of the authorities being preoccupied. I'm not attempting to get people stoked up on weapon recommendations (there is a lot of knowledge on this board), but make sure you have a pistol or a shotgun and some ammo.
also, I have found that some of the bulk shopping stores like BJs and price club are great for supplies...rice, peanut butter, grains, canned vegetables, grains, etc.