If your fridge and freezer turned off overnight and the temperature inside rose above the safe temperature for storing perishable food, it's generally recommended to err on the side of caution and discard any unopened meat that was previously frozen. Here's why:
Temperature fluctuation: When the fridge and freezer lose power, the temperature inside rises, causing the food to thaw. Once the temperature rises above the freezing point, the quality and safety of frozen meat can be compromised. Even if the meat refroze after power was restored, it's difficult to determine the exact duration and conditions under which it remained unfrozen.
Bacterial growth: Bacteria can multiply rapidly in the temperature danger zone, which is between 40°F (4°C) and 140°F (60°C). If the temperature of the frozen meat rose into this danger zone, bacteria may have started to grow, leading to potential foodborne illnesses.
Texture and quality changes: The freezing and thawing process can affect the texture, taste, and overall quality of the meat. The repeated freezing and thawing can cause ice crystals to form, resulting in moisture loss, texture changes, and potential loss of flavor.
To ensure food safety, it's generally recommended to discard any meat that has thawed due to a prolonged power outage. It's better to prioritize your health and avoid the risk of consuming potentially unsafe food. Remember to check the manufacturer's recommendations for any specific storage guidelines for the meat you had in the freezer.