One of the greatest outcomes of Hurricane Katrina was FEMA recognizing the importance of pets during a natural disaster. FEMA opened the door to the creation of pet friendly shelters. People like the idea of being sheltered with their pets.
Often preparation is the most important aspect of disaster preparedness; but cleanup after a disaster will aid in being allow back. I was never able to make headway in opening pet friendly shelters in a county in north Florida because one previous attempt was made, years before my arrival, in a public school. Whoever organized the sheltering of animals in the school left the cleanup to school personnel. School administration never forgot that.
It is an important reminder that cleanup after a disaster could be the most important aspect of preparing for your next disaster. In the Boy Scouts, we always had a rule to leave a campsite better than we found it. It is a good rule to follow when closing down a pet shelter following a disaster.