In 2012 more than 30 million people fled their homes worldwide from natural disasters. A senate sub-committee determined that 1 in every 100 individuals will be displaced in their lifetime due to natural disasters. Factoring in war, monetary collapse and grid-down events radically increases that number.
FEMA states that all persons should have a 72 hour quick evacuation bag prepared at all times. That bug-out-bag and its carefully chosen contents should be ready for immediate use.