You should only prep for disaster if you want to survive a disaster, which is rare for more people. I live in earthquake country, and though I have not experienced anything larger than M4 in the past 28 years, stochastically we can expect a very large ($BILLIONS, with massive short term problems) quake at some point in Northern California in the next 50 years.

The items I describe fit on a single shelf (except the water; I have a water filter and a nearby stream, so I only keep a few liters on hand).