Catastrophes can happen at any time. Preparing for three days will help you make it through many of the disasters you’ll face in the Puget Sound region—including major storms and even small earthquakes. However, to make it through a major catastrophe—like Hurricane Katrina or the Japan earthquake—you’ll need to be prepared for longer—at least seven to 10 days.
What does it mean to be prepared?
Have an emergency supply kit for at least three days.
Stay informed, know how to get information and alerts from local state, tribal, and territorial emergency management agencies, and understanding the specific risks in your community and preparing against them.
Visit this site for more info Kitsap County Department of Emergency Management.