You know the old saying "If life gives you lemons make lemonade". Sometimes it makes sense to just be prepared for the unexpected. Here in Kansas you get a variety weather conditions that with send you into survival mode. Everyone one knows about tornado in Kansas if you have ever watched The Wizard of OZ. However, your house would most likely not make a soft landing somewhere but will be damage, if not destroyed, by the powerful wind. Another less know weather event that can wrench havoc on your lifestyle is the winter ice storms. You can be out of electricity for weeks as what happen in Kansas a couple of years ago. We though we were prepared for the most part and we were all right with food but water became the limiting factor. Without electricity to power the water pump on the well we were left with the little water we had. It was a few days worth.
As for food, I store a variety of food product such a Grocery store purchased canned food, using http://www.grandpappy.info/ as a reference, MRE's and freeze dried products such as found at http://beprepared.com/. I store my rice an other grains in the large pails with liners and Oxygen Absorbers to last longer.The reason I like Robert Wayne Atkins, P.E.web site is it is done with items you can obtain locally. However, the number 10 freeze dried food is a little easier to store and takes up less space. If you do plan to make a Food Supply for you or your family make sure it has variety because the same food can create Appetite Fatigue. Your mind will not want to eat the same food over and over again.
Be prepared and do not expect the Government to take care of you.