Otherwise, leave the police alone. Don't call utilities to report failures. They know exactly where power, water and gas are out. Do call if several days have passed and your neighborhood is the only one still out, or if your home is the only one still out in the neighborhood. If after a disaster you have to leave town, take your pets with you.
Pets are unlikely to survive on their own.
In the first few days after the disaster, leash your pets when they go outside. Always maintain close contact. Familiar scents and landmarks may be altered and your pet may become confused and lost. Also, snakes and other dangerous animals may be brought into the area with flood areas. Downed power lines are a hazard.