The lights flicker, then go out and suddenly you're standing in your kitchen wondering how much of what's in your fridge you're about to lose. 

It happens to everyone at some point. A storm rolls through, a transformer blows or your utility company schedules a shutoff you didn't plan for. Whatever the cause, the food safety questions are always the same. How long can food go without power before it turns dangerous? What should you actually toss, and what's fine to keep?

So, we’ll walk you through exactly how long your fridge and freezer will hold their cold, the best food for a power outage, what to stock up on before the next outage catches you off guard, and a few easy meals you can throw together with zero electricity.

How Long Will a Refrigerator Stay Cold Without Power?

Here's the number to remember: four hours. That's how long food is good in a fridge without power, and it's also how long a full refrigerator will keep food at a safe temperature once the power cuts out, as long as you keep the door shut.

So how long can a fridge go without power before you need to start worrying? Once you hit that four-hour mark, the USDA recommends tossing anything perishable: meat, dairy, eggs, leftovers, anything that needs to stay cold to stay safe. That's the honest answer to how long food lasts in a fridge without power. Once you're past four hours, you're gambling with foodborne illness, not just quality. Every time you open the door, you let warm air in and speed up the clock, so resist the urge to peek.

If you know a storm is coming, drop your fridge's temperature a few degrees ahead of time. A colder starting point gives you a little extra buffer once the power actually goes out.

How Long Does Food Keep in a Freezer Without Power?

Your freezer buys you a lot more time than your fridge does. A full freezer holds a safe temperature for about 48 hours. A freezer that's only half full will get you around 24 hours. Either way, the door needs to stay closed.

Not sure if your freezer food survived the outage? Check for ice crystals. If food still has ice crystals on it or reads 40°F or below, it's safe to refreeze, though the texture and taste might take a small hit. If it's warmer than that, and has been sitting in the danger zone a while, it's time to let it go.

One trick that actually helps: if your freezer isn't packed full, group everything together in the center. Food huddled together stays cold longer than food spread out with empty gaps between it.

How Long Can Food Be Left Out?

This is where the two-hour rule comes in, and it applies whether your power is out or you're just leaving food on the counter after dinner. Perishable food shouldn't sit between 40°F and 140°F, what food safety folks call the danger zone, for more than two hours. If it's hotter than 90°F outside, cut that down to one hour.

So how many hours can food be held without temperature control before bacteria becomes a real risk? Two hours is your outer limit under normal conditions, and bacteria in that danger zone can double in as little as 20 minutes. That's why the old advice to "just smell it and see" doesn't hold up. You can't smell or taste your way to safety here. When in doubt, throw it out.

Non-Perishable Foods for Power Outages

This is the part of outage prep people tend to skip until they're standing in a dark kitchen with nothing to eat. A stocked pantry of non-perishable foods means you're not scrambling to figure out dinner while also worrying about your fridge.

Good non-perishable foods for power outages include:

• Canned beans, soups and vegetables
• Canned tuna, chicken or salmon
• Peanut butter and crackers
• Dried fruit and nuts
• Shelf-stable milk or plant milk
• Cereal and granola bars
• Jarred sauces you can eat cold or heat over a camp stove

Rotate these every so often so nothing sits in the back of your pantry past its date, and keep a manual can opener somewhere you'll actually remember (not just in a drawer full of takeout menus and rubber bands).

Canned Goods for Power Outage: What to Stock Up On

Canned goods deserve their own callout because they're the backbone of any outage-ready pantry. They don't need refrigeration, they don't spoil quickly and most of them can be eaten straight from the can if you're stuck without a way to heat anything up.

When you're picking out canned goods for a power outage, look for a mix of protein, vegetables and fruit so you're not just eating beans for three days straight. Canned chili, canned chicken and canned soup are easy wins because they're filling on their own. Canned fruit gives you something sweet when everything else feels like survival mode.

Keep a few cans set aside specifically for emergencies rather than digging into your everyday pantry stash. That way you always know you have food on hand for a power outage, no matter what else has been used up that week.

Power Outage Meals That Don't Need Electricity

You don't need a working stove to eat well during an outage. A few power outage meals worth keeping in your back pocket:

• Cold bean and corn salad: Canned black beans, canned corn, a little oil and vinegar, done.
• Tuna or chicken salad: Straight out of the can, mixed with mayo or mustard, scooped onto crackers.
• PB&J or peanut butter on crackers: Not glamorous, but it works every time.
• Trail mix bowls: Nuts, dried fruit and whatever cereal you have on hand.
• Canned soup, cold or warmed on a camp stove or grill: Surprisingly solid when you're not picky.

None of these require you to open your fridge or freezer, which means you're not letting out cold air you need to keep everything else safe.

Tips to Keep Your Food Cold Longer During an Outage

A few small moves can stretch that four-hour fridge window and 48-hour freezer window even further.

Keep coolers on hand and packed with ice for anything you'll need to grab often, like milk or leftovers, so you're not opening the main fridge door every time you're hungry. A hard-sided cooler with real insulation, like Cordova's Basecamp cooler with its Ecofoam walls, can hold ice for days rather than hours, which matters a lot when you don't know how long the outage will last. Pack it with block ice or Cordova's PackIce packs before the storm even hits, and you've got a backup fridge sitting in your garage or on your porch.

Group your freezer items together, keep both doors shut as much as humanly possible, and if you have advance warning of an outage, fill any empty jugs with water and freeze them ahead of time. Frozen water jugs act like extra ice packs and help everything around them stay colder longer.

Wrapping Up

Power outages are stressful enough without adding a fridge full of question marks to the mix. Know your limits: four hours for the fridge, 48 hours for a full freezer, two hours for anything left out on the counter. Stock a pantry with canned goods and other non-perishable foods so you're never stuck wondering what to eat. And if you can, keep a good cooler and some ice on standby so you've got backup cold storage the moment the lights go out.

You can't control when the power goes out, but you can absolutely control how prepared you are for it.

How to keep food safe during a power outage?

Keep your fridge and freezer doors closed as much as possible, use coolers with ice for items you need often and follow the four-hour rule for fridge food and the 48-hour rule for a full freezer. When in doubt about anything perishable, throw it out rather than risk foodborne illness.

What food to stock up on during a power outage?

Focus on canned goods like beans, soups, tuna and chicken, along with peanut butter, crackers, dried fruit, nuts, cereal and shelf-stable milk. These don't need refrigeration and can be eaten straight from the container if you don't have a way to heat food up.

How long does food stay safe during a power outage?

Refrigerated food stays safe for about four hours once the power goes out, as long as the door stays shut. Frozen food lasts about 48 hours in a full freezer or 24 hours in a half-full one. Anything left out at room temperature should be tossed after two hours, or one hour if it's above 90°F.

How long will a refrigerator keep food cold without power?

About four hours, assuming the door stays closed the whole time. Every time you open it, you let cold air escape and warm air in, which shortens that window. If you know a storm's coming, chill your fridge a few extra degrees ahead of time to buy yourself a bit more cushion.

How long will a freezer keep food frozen during a power outage?

A full freezer holds a safe temperature for around 48 hours, while a half-full freezer lasts about 24 hours. Keeping the door closed and grouping items together in the center helps everything stay colder for longer. If food still has ice crystals or reads 40°F or below when the power comes back, it's safe to refreeze.