We must be concerned in keeping food for storage. Remembering calamity like Hurricane Katrina and the latest destruction caused by the earthquake and tsunami in Japan, it is simple to implement the motto "Be Prepared!" No one knows when a natural calamity will make you the next casualty, and the next person struggling for survival until help can get there.
Divulging, some areas of these types of calamities will create destruction well beyond what can be realistically expected to be handled with a supply of long term food storage products in keep, but for those that are left on the margin of these calamities, they will require to find ways to get by for days or perhaps even weeks. Preparation for the "probable" can be a sign of great wisdom.