by 
The Curious Bag
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<h4 class="dechead">On One Hand: Turn Circuit Breakers Off During Outage
If the power goes out in your home---along with the rest of the neighborhood's power---consider finding your main electric box and switching all the circuit breakers to the "off" position. This will protect against a power surge in your home when power returns.
On the Other: Unplug Appliances to Stave Off Power Surge
During a power outage, unplugging all major appliances can have the same effect as switching all circuit breakers to the "off" position.
Bottom Line
While you can unplug all of your appliances during a power outage to avoid a power surge when the power returns, it is easier and more effective to switch all of the circuit breakers to the "off" position. This will ensure you did not miss any appliances and allow you to turn on electricity to one room at a time once power is restored.
Source:
ElectricianDirectory.com: What to do During a Power Outage
Apartment Ratings: When Your Apartment Complex Loses Power
More Information:
UniSource Energy Services: What To Do If There's A Power Outage
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