In the event you don't need to evacuate, you still need to be prepared to be without power for several days. And the biggest problem when the lights going out is the spoiled food.
The Department of Health suggests keeping your refrigerator and freezer doors closed as much as possible in the event of a power outage. A full freezer can hold its temperatures for about 48 hours. A freezer that is half full will hold for about 24 hours if kept closed.
To keep your freezer full, don't worry about buying new food. Instead, just fill plastic bags or containers with water to fill in the extra space and place them in the freezer before the storm. This will also provide you with ice and clean drinking water.
According to FoodSafety.gov, food in a refrigerator should be safe for up to 4 hours in the door is kept closed as much as possible. They have an online guide for how to deal with specific foods.