How Long Is Food Good in a Fridge Without Power?

Written by Staff Writer

A frustrated woman looks into an open fridge.

The lights suddenly go out. Everything goes quiet, the refrigerator stops running, and you suddenly wonder what will happen to the milk, meat, eggs, leftovers and everything else inside.

Some items are safe for a while without refrigeration. Others spoil much faster. To know what to keep and what to throw away, you need to understand how long your refrigerator and freezer can maintain a safe temperature and how to check that products are safe once the lights are back on.

In this guide, we explain how long food is safe in a refrigerator or freezer without power, what makes certain items riskier during an outage and the steps you should take to protect yourself and anyone who eats the meals you prepare.

How Long Does Food Last During an Outage?

In short: it depends. Refrigerated perishable food can stay safe for up to four hours during a power outage if the refrigerator door stays closed. Frozen foods and some stable refrigerated items, including many condiments and whole produce, can last longer.

These time limits are basic benchmarks during an outage:

  • A closed refrigerator can keep food safe for up to four hours.
  • A full, closed freezer can keep food safe for about 48 hours.
  • A half-full, closed freezer can keep food safe for about 24 hours.

It is important to keep the doors tightly closed unless absolutely necessary. Every time you open the refrigerator or freezer, cold air escapes. That shortens the length of time it can maintain a safe temperature.

Why Temperature Matters During a Power Outage

Once refrigerated products rise above 40 degrees Fahrenheit, bacteria grows more quickly. Items don’t become unsafe immediately, but that’s the threshold at which the clock starts running.

This is important to keep in mind because unsafe food doesn’t always look spoiled. It may smell normal, taste normal and look the same as it did before the outage. You cannot rely on your senses to decide whether an item is safe. Instead, use time, temperature and the type of food as your guide.

What to Do When the Power Goes Out

Keep the doors closed as much as possible.

If you know when the power went out, write down the time. If you don’t know, be more cautious when sorting items later.

If the outage is expected to last longer than four hours, move refrigerated perishables into a cooler with ice or frozen gel packs if possible.

If you have appliance thermometers, place one in the cooler to monitor the temperature to ensure it stays below 40 degrees Fahrenheit. If the inside of the cooler gets warmer than that for four hours, frozen and perishable items should be thrown away.

What Should You Throw Out After a Power Outage?

Some items are more likely to spoil quickly. These are called perishable foods. This group includes any items that require refrigeration to slow bacterial growth and prevent foodborne illness.

Common perishables include:

  • Milk, cream, yogurt and soft cheeses
  • Eggs and egg dishes
  • Meat, poultry, fish and shellfish
  • Deli meat, hot dogs and open containers of lunch meat
  • Cooked vegetables, rice, pasta, beans and grains
  • Soups, stews, casseroles and leftovers
  • Cut fruit and cut vegetables
  • Prepared salads with mayonnaise, eggs, meat or potatoes

Perishables should be thrown out after four hours without refrigeration unless they were kept cold with another safe method.

Throwing away food can be frustrating, especially if you just made a large grocery trip. However, foodborne illness can be a serious health risk. If you can’t confirm that a perishable item stayed cold, it’s safer to discard it.

Never taste something to check whether it is safe. Even a small bite can still expose you to harmful bacteria or toxins.

What Food Can You Usually Keep?

Not every item in the refrigerator needs to be thrown away after a short outage. Some are more stable and less likely to become unsafe if they warm slightly for a limited time.

You can usually keep hardy or shelf-stable products like:

  • Butter and margarine
  • Hard cheeses
  • Whole fresh fruits
  • Whole fresh vegetables
  • Ketchup, mustard, relish and pickles
  • Jam and jelly
  • Peanut butter
  • Baked goods including bread, rolls and tortillas
  • Unopened canned or jarred goods

Always check the label. Some items are shelf stable until opened. After the safety seal is broken, those items then need refrigeration. If an opened product contains perishable ingredients like dairy, eggs, meat, seafood, cooked grains or cut produce, treat the entire product as perishable.

How to Check Freezer Food After a Power Outage

Frozen items are usually easier to evaluate than refrigerated items. If frozen foods still contain ice crystals, they can still be safely cooked or refrozen. If a frozen item has fully thawed above 40 degrees Fahrenheit for two hours or more, throw it away.

Be especially careful with:

  • Ground meat
  • Poultry
  • Seafood
  • Frozen meals
  • Casseroles
  • Items with dairy-based sauces
  • Ice cream and frozen yogurt
  • Custard-filled desserts

When you are unsure if a frozen item is still okay, it’s better to be safe than sorry. If you can’t confirm the item stayed cold enough, discard it.

How to Prepare Before an Outage

A little preparation can help you save more meals and make safer decisions during the next outage.

Keep working appliance thermometers in both the refrigerator and freezer. This gives you a quick way to check conditions inside. If you can only guess, you may end up keeping unsafe items or throwing away edible food.

It also helps to keep a clean cooler and frozen gel packs available in case of an emergency. Also, keep a few extra water bottles in your freezer. They can help stabilize temperatures by keeping your freezer full and can be moved to a cooler if needed.

Here are some additional habits that can help you stay prepared:

  • Keep the refrigerator at 40 degrees Fahrenheit or below.
  • Keep the freezer at 0 degrees Fahrenheit or below.
  • Freeze items you don’t plan to use right away.
  • Group items in the freezer close together so they stay cold longer.

Taking the time to prepare in advance gives your food a better chance surviving a power failure and saves you from rushing to save perishables in the middle of an outage.

Safer Storage Through Training

If you work in food service, the right training can help you respond to food safety risks with confidence. StateFoodSafety offers state-approved Food Handler Card courses that cover safety and storage basics as well as Hazard Analysis and Critical Control Points (HACCP)-focused training for teams that need a deeper understanding of hazard control and preventive systems.

Each course helps you build the knowledge and skills to help protect customers and make safer decisions when conditions change, including when the lights go out.