How to Prepare Your Home for a Power Outage

Of all the emergencies a household is likely to face, a power outage is by far the most common. Storms, high winds, equipment failures, grid overloads, accidents, and even planned maintenance can all bring the electricity down — sometimes for hours, occasionally for days. In most cases the disruption is a manageable inconvenience. But when an outage stretches beyond a few hours, particularly in winter or for households with medical equipment, young children, or elderly members, the consequences can escalate quickly.

The good news is that power outages are also one of the most straightforward emergencies to prepare for. With a few simple steps taken in advance, most households can ride out even a multi-day outage in reasonable comfort and safety. This guide covers what to do before, during, and after the power goes out.

1. Understanding What Stops Working

The first step in preparing for a power outage is understanding just how much of your home depends on electricity. It's more than most people realise.

When the power goes out, you lose electric lighting, heating (if your system uses electricity — including heat pumps, electric radiators, and the fans or pumps in many gas and oil boilers), refrigeration and freezing, cooking appliances, hot water, internet and Wi-Fi, phone charging, and any powered medical equipment. In many modern homes, even the doorbell and some locks run on electricity.

If your home relies entirely on electric heating — and in many countries, this is increasingly the norm — a winter outage can become a serious cold-weather hazard within hours. Alternative heating is one of the two most critical elements of household self-preparedness, alongside drinking water — every household should have a plan for staying warm without electricity.

2. Heating Without Electricity

In cold climates, warmth is a survival priority. If your only heat source is electrical, you need at least one backup option.

A wood-burning stove or fireplace is the most reliable alternative if your home has one — keep a supply of dry firewood on hand throughout the colder months. A gas heater or paraffin stove rated for indoor use is another option — proper ventilation is essential, and appliances must be specifically designed for indoor use.

If you don't have a fixed alternative, consider arrangements with a "preparedness buddy" — a neighbour, friend, or family member who does have an alternative heat source and can host your household during an extended outage. Not every household can install a wood stove, but everyone can make a plan.

In the shorter term, insulating your living space makes a significant difference. Close off rooms you don't need and concentrate your household in the warmest area. Hang blankets over windows and block draughts under doors. Dress in layers, use sleeping bags and extra blankets, and remember that body heat from several people in a smaller space adds up meaningfully.

3. Lighting

A house without light after dark is disorienting and potentially dangerous — trips and falls become a real risk, especially for children and older adults.

Keep a torch or headlamp with spare batteries in an accessible location. Headlamps are particularly useful because they leave both hands free for cooking, carrying things, or helping children. Store batteries separately from devices to extend their shelf life, and check them every six months.

Candles provide ambient light but come with a fire risk — never leave them unattended, keep them away from anything flammable, and use stable holders on flat surfaces. Battery-powered LED lanterns are a safer alternative for general room lighting and last much longer than candles.

A torch is one of the most basic preparedness items every household should have. Where possible, keep torches or headlamps that run on different power sources — battery, hand-crank, or solar — so you're not left without light if one option runs out.

4. Communication and Staying Informed

During a power outage, your Wi-Fi router goes offline, your TV stops working, and your phone's battery starts its countdown. Staying informed about the situation — how widespread the outage is, when power is expected to return, and whether any further action is needed — becomes surprisingly difficult.

A battery-powered or hand-crank radio is the single most important communication tool during an outage. Most countries designate a national emergency broadcast station or frequency — find out which one covers your area and mark it on your radio's dial in advance, so you're not searching for it once the power is already out.

For your phone, keep a fully charged portable power bank at home. A 10,000–20,000 mAh power bank can recharge a smartphone several times and costs relatively little. Keep your phone in low-power mode during an outage to extend battery life, and avoid unnecessary use — save it for essential communication.

Write down key phone numbers on paper — your electricity provider's fault reporting line, local emergency numbers, family contacts, and your doctor or pharmacy. When your phone is dead, a paper list is the only list you have. If you haven't already, build a family emergency communication plan so that every household member knows who to contact and how.

5. Food Safety During a Power Outage

Your refrigerator and freezer are on the clock the moment the power goes out.

A closed refrigerator will keep food safe for up to four hours. A full freezer holds its temperature for approximately 48 hours (24 hours if half full). The consistent guidance is to keep the doors closed as much as possible — every opening lets cold air escape.

If the outage looks like it will last more than four hours, transfer perishable fridge items into a cooler with ice packs if you have one. After four hours without power or a cold source, perishable foods — meat, fish, poultry, dairy, eggs, and cooked leftovers — should be eaten soon or discarded.

The cardinal rule is when in doubt, throw it out. Never taste food to determine whether it's safe. If something has been above 5°C for more than four hours, it should go.

For cooking during the outage, rely on your emergency food supply of shelf-stable items and any backup cooking method you've prepared — a gas barbecue or camping stove outdoors, or a fondue set, chafing dish, or fireplace indoors. For a complete guide to building and maintaining that supply, see our guide to storing food for long-term emergency preparedness. Never use charcoal grills, gas stoves designed for outdoor use, or generators inside your home — carbon monoxide is odourless and deadly.

6. Water Considerations

In many areas, the water supply continues to function during a power outage because water systems often have backup power. However, this isn't guaranteed — particularly in buildings that rely on electric pumps to maintain water pressure, or in areas where water treatment plants are also affected.

If you're unsure whether your tap water is safe during an outage, avoid using it for drinking or cooking until you can confirm with your local water supplier. Having stored water on hand removes this uncertainty entirely. Even a modest reserve — about 20 litres of water per person, or roughly 3 litres a day for a week — provides valuable breathing room. For a step-by-step guide to building your reserve, see our guide to storing tap water for long-term emergency preparedness.

If you have an electric hot water tank, it contains a significant reserve of clean water that can be used in an emergency. Check your system's manual for how to safely drain water from the tank if needed.

7. Medical Equipment and Vulnerable Household Members

Power outages pose a particular risk to anyone who depends on electrically powered medical equipment — CPAP machines, home oxygen concentrators, powered wheelchairs, electric hospital beds, refrigerated medications (such as insulin), and dialysis equipment.

If anyone in your household relies on such equipment, take three preparedness steps well in advance. First, contact your electricity provider and register on their priority services register (most countries operate one). This ensures you receive advance warning of planned outages and may qualify for faster restoration during unplanned ones. Second, talk to your healthcare provider about backup plans — some devices have battery packs, and your provider may be able to supply one or advise on alternatives. Third, keep a written plan that details what to do if power is lost, including who to contact and where to go if the outage cannot be waited out.

8. Protecting Electronics and Appliances

When power returns after an outage, it sometimes comes back with a surge that can damage sensitive electronics. Unplug computers, televisions, and other expensive or sensitive devices during the outage, and plug them back in once the power has been stable for a few minutes.

Leave one light switched on so you know when the power returns. If you have a surge-protected power strip, use it for valuable electronics as a matter of routine — it provides protection not just during outages but against everyday voltage fluctuations.

9. What to Do When the Power Comes Back

Once the electricity is restored, work through a short checklist. Check your fridge and freezer temperatures — if you have an appliance thermometer, verify that the fridge is at or below 5°C and the freezer is at or below -18°C. Discard any perishable food that's been above safe temperatures for too long.

Reset clocks, timers, and any programmable devices — heating thermostats, alarm systems, and scheduled appliances may need attention. Reconnect any devices you unplugged. And restock or recharge anything you used during the outage: replace batteries in your torch, recharge your power bank, and replenish any emergency food or water you consumed.

10. A Simple Preparation Checklist

The preparation for a power outage is modest and mostly involves gathering items you may already own and putting them in known, accessible locations.