What to Do If the Power Grid Fails: A Step-by-Step Safety Plan

If the power grid fails, your first moves are to stay calm, confirm how widespread the outage is, and start conserving food, water, and battery power right away. Keep refrigerator and freezer doors shut, skip candles in favor of battery-powered light, and run any generator outdoors only. If the outage stretches into days, lean on stored supplies and a packed go-bag rather than waiting to improvise once conditions get worse.

What To Do the Moment the Power Goes Out

Panic leads to bad decisions, so the first step is simply to slow down and assess. Check whether the outage is limited to your home or affects the whole neighborhood, and turn to a battery-powered or hand-crank radio for updates from local authorities. Ready.gov's general guidance is to be prepared to sustain your household for at least 72 hours without outside help, which is a useful baseline to keep in mind as soon as the lights go out.

• Check your home first. A tripped breaker is a five-minute fix. A neighborhood-wide blackout is a different situation entirely.
• Listen for official updates. A battery or hand-crank radio works when cell towers and Wi-Fi don't.

How To Conserve Food, Water, and Battery Power During a Blackout

Once you know the outage could last a while, shift into conservation mode. Resources you'd normally use freely become limited assets.

• Eat perishables first. Keep the refrigerator and freezer doors closed as much as possible to hold the cold longer.
• Ration stored water. If your home relies on an electric well pump, your regular water supply may be unavailable. A commonly cited guideline is about one gallon of water per person, per day, for drinking and basic hygiene.
• Preserve battery life. Use flashlights sparingly, power down devices you're not actively using, and avoid draining your phone unless you need it.

Home Safety and Security During a Power Outage

With alarm systems and cameras potentially offline, safety and security deserve deliberate attention.

• Skip the candles. Battery-operated lights remove the fire risk that comes with open flame.
• Lock up. Secure doors and windows, since electronic security systems may not be functioning.
• Run generators outdoors only. Place any generator outside, away from windows and doors, in a well-ventilated area to prevent carbon monoxide poisoning.

How To Stay Warm or Cool Without Electricity

Temperature control is one of the more physically demanding parts of an extended outage, particularly for very young, elderly, or medically vulnerable household members.

• In cold weather: Dress in layers, use blankets, and consider setting up a tent indoors to help conserve body heat. Gathering everyone in one room can help the space stay warmer with less effort.
• In hot weather: Wear light clothing, stay hydrated, and stick to the coolest areas of the home. Damp cloths can help you cool down, and it's worth avoiding strenuous activity until things return to normal.

Staying Connected When the Grid Is Down

Communication becomes harder right when it matters most, so plan for it before an outage rather than during one.

• Keep devices charged. Car chargers and portable power banks are the most reliable way to keep a phone usable.
• Set up check-ins. Arrange regular check-in times with family and neighbors, especially anyone elderly or with special needs.
• Use what connectivity you have. If cell data or Wi-Fi is still working anywhere nearby, social media and emergency alert apps can help you stay current on the situation.

Planning for Medical Needs During an Extended Outage

If anyone in your household depends on medical equipment or medication that needs refrigeration, this is the area where advance planning matters most.

• Have backup power for essential equipment. A battery or backup power source for critical medical devices should be part of your plan, not an afterthought.
• Keep medication cold. A cooler with ice packs can maintain the temperature range many medications require.

This article covers general preparedness steps only and isn't a substitute for guidance from your doctor or pharmacist about your specific medications or equipment.

When To Evacuate During a Power Grid Failure

Not every outage is safe to wait out at home, especially if it's tied to extreme heat, extreme cold, or a wider emergency. Knowing your evacuation triggers ahead of time keeps you from having to decide under pressure.

• Follow official guidance. Heed evacuation orders from local authorities rather than waiting to see how bad things get.
• Have a go-bag ready before you need it. A packed bag with food, water, medications, important documents, and a change of clothes turns evacuation into a grab-and-go decision instead of a scramble. Our 72-hour bug out bag checklist walks through exactly what to include, and the Complete 72 Hour Fully Loaded Bug Out Bag is a pre-packed option if you'd rather start from a finished kit.
• Know your routes. Map more than one way out and have a few possible destinations in mind, whether that's family, friends, or a designated shelter.

Building a Power Outage Preparedness Plan

The households that handle grid failures well are the ones who prepared before the lights went out, not during. Staying calm, conserving resources, securing your home, and having a go-bag staged and ready are the core pieces. Check and rotate your emergency supplies periodically, roughly twice a year is a common rule of thumb, so batteries, water, and food are actually usable when you need them. Browse our full bug out gear collection if you're building out your kit from scratch.

Frequently Asked Questions

How long should you be prepared to go without power?

Ready.gov's general emergency preparedness guidance recommends households be able to sustain themselves for at least 72 hours without outside help. That 72-hour window is a widely used baseline for food, water, and power backups, though severe events can last longer.

Is it safe to run a generator indoors?

No. A generator should always be run outdoors, away from windows and doors, in a well-ventilated area. Running one indoors or in an enclosed space risks carbon monoxide poisoning.

How much water should I store in case the power goes out?

A commonly cited guideline is about one gallon of water per person, per day, covering drinking and basic hygiene needs. If your home uses an electric well pump, your normal water supply may not be available during an outage, so stored water becomes especially important.

What should be in a go-bag for a power grid emergency?

A go-bag for a grid-down emergency should include food, water, any needed medications, important documents, and a change of clothing at minimum. Preparing it in advance means you can leave quickly if authorities issue an evacuation order.