Is Food Safe After a Power Outage? Refrigerator Food Safety Guide

Is Food Safe After a Power Outage?

After a power outage, one of the most important questions is: which food is still safe to eat, and what needs to be thrown away? The USDA has clear guidelines for this — and the stakes are high, since eating spoiled food can cause serious foodborne illness. Here's a complete guide.

The Core Rule: The 2-Hour / 40°F Rule

The USDA's fundamental food safety rule for power outages:

• If perishable food has been above 40°F (4°C) for more than 2 hours, it should be discarded.
• If the fridge stayed below 40°F throughout the outage, food is safe.

The challenge is knowing whether your fridge actually stayed below 40°F. This is where a thermometer with max/min memory is invaluable. The AcuRite Digital Wireless Fridge and Freezer Thermometer with Alarm records the highest temperature reached during the outage, so you know exactly what happened even if you weren't home.

How Long Does a Refrigerator Stay Cold Without Power?

• A closed refrigerator stays cold for approximately 4 hours.
• A full, closed freezer stays frozen for approximately 48 hours.
• A half-full freezer stays frozen for approximately 24 hours.

These times assume the doors remain closed throughout the outage.

Refrigerator Food: What to Keep and What to Discard

Discard if Above 40°F for More Than 2 Hours

• Raw or cooked meat, poultry, and seafood
• Milk, cream, yogurt, and soft cheeses
• Eggs and egg-based dishes
• Cooked pasta, rice, and potatoes
• Cooked casseroles, soups, and stews
• Cut fruits and vegetables
• Opened mayonnaise, tartar sauce, and horseradish
• Custards, puddings, and pies with custard filling

Generally Safe to Keep

• Hard cheeses (cheddar, parmesan, romano)
• Butter and margarine
• Fruit juices (opened)
• Fresh fruits and vegetables (whole, uncut)
• Fruit pies
• Bread, rolls, cakes, and muffins
• Peanut butter, jelly, and jam
• Vinegar-based salad dressings
• Mustard, ketchup, and relish
• Fruit, vegetable, and nut pies

Freezer Food: What to Keep and What to Discard

Safe to Refreeze or Cook

• Food that still contains ice crystals.
• Food that is at 40°F or below.

Note: Refreezing may affect texture and quality but is safe from a food safety standpoint.

Discard

• Meat, poultry, or seafood that has thawed completely and been above 40°F for more than 2 hours.
• Ice cream and frozen yogurt that has melted.
• Frozen meals that have thawed and been above 40°F for more than 2 hours.

The Golden Rule: When in Doubt, Throw It Out

You cannot tell if food is safe by smelling or tasting it. Many dangerous bacteria (like Salmonella and E. coli) don't change the smell, taste, or appearance of food. If you're not sure whether food was above 40°F for more than 2 hours, discard it. The cost of replacing food is far less than the cost of foodborne illness.

How to Be Prepared for Future Outages

• Keep a thermometer with max/min memory in both the fridge and freezer at all times.
• Keep the freezer as full as possible — a full freezer stays cold longer.
• Fill empty freezer space with water bottles frozen in advance.
• Have a supply of ice or dry ice available during storm season.

Quick Reference: Power Outage Food Safety

• Fridge safe for 4 hours (closed door).
• Full freezer safe for 48 hours (closed door).
• Half-full freezer safe for 24 hours (closed door).
• Discard perishables above 40°F for more than 2 hours.
• Freezer food with ice crystals or below 40°F is safe.
• When in doubt, throw it out.