The Postal Service encourages employees to create disaster supply kits that contain food, water and other necessities for emergencies.
If a hurricane, tornado, wildfire or flash flood strikes, you may not have time to search for these supplies or shop for them.
Relief workers will likely arrive after an emergency, but they may be unable to reach everyone immediately. This is why you should have enough supplies to last at least 72 hours, experts say.
The Federal Emergency Management Agency site offers a checklist for disaster kits.