I grew up in a Mormon household, and I still think that the practice of keeping food storage and 72-hour kits is one of the smartest practices in that culture. I still keep a bag of emergency supplies in my apartment and car, and even though I'm just a grad student who doesn't have like a two-year supply of wheat and water, having a small supply is a good idea in case of short-term disaster in your area. Furthermore, I find such practices encourage me to buy certain kinds of food in bulk, which has been better on my wallet. It's hard for me to understand some of my fellow students who let their kitchens go completely empty on a regular basis.