 When a major storm knocks out your power for several days, you might be wondering how to keep the food in your fridge and your freezer safe. As soon as the power goes out, take anything from your fridge that can be frozen and move it into the freezer and group it close together. The closer it's grouped together, the longer it'll stay cold. A well-stocked freezer should hold its temperature for about 24 to 48 hours. But every time you open the door to take a look, that cold air is going to escape. So remember, no peeking.