First, don't panic. It's not the end of the world, you are not going to die. Keeping your head during this time is the most important thing you can do for your safety.
Know where your flashlights are and have fresh batteries in them. You do have a flashlight??
Gather all family members in the same room to make sure all are accounted for and assure them that everything is and will be ok. Give each family member a flashlight to use as necessary. Candles are always important during an emergency, find them and light them to provide light for all to move freely and safely around the house.
I always shut off my main power breaker and you need to make sure any gas appliances are shut off too. Some use an electric thermostat or pilot light and may not perform as they should without electricity. This is for the safety of the whole family.
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