FEMA says:
"The behavior of pets may change dramatically after a disaster. Normally quiet and friendly cats and dogs may become aggressive or defensive."

Pet owners beware:

• Floods, fires and quakes can flip out your finned, feathered and furry friends.
  
• If you must evacuate, take Fluffy/Fido with you.
  
• For health and space reasons, pets are forbidden in public emergency shelters.
  
• If, as a last resort, you have to leave your pets behind, make sure you have a plan to ensure their care.
  
  

Source: Federal Emergency Management Agency

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