Keeping Warm During a Winter Power Cut

Warm people before you try to warm the building

When the heating stops, the cheapest and most reliable warmth is insulation around the person. Several thin layers, a warm hat, socks, blankets and sleeping bags continue working no matter how long the power is out.

Government cold-weather guidance recommends several layers of thin clothing and, under normal circumstances, keeping the rooms you spend most time in at least 18°C. During an outage you may not be able to maintain that temperature, which makes clothing and room choice more important.

Shrink the space you are trying to manage

Choose one occupied room if practical. Close internal doors to rooms you are not using and draw curtains to reduce heat loss. Block obvious draughts without covering necessary ventilation. Move blankets, torches, drinks, medication and chargers into that room early rather than repeatedly opening doors later.

If sunlight is available during the day, use it. When the sun has gone down, close curtains again. A small amount of deliberate heat retention is more useful than trying to electrically heat an entire cold house from a battery.

Know who needs more attention

Cold affects everyone, but older people, babies and young children, people with long-term health conditions, people who are pregnant, and people with limited mobility can face greater risk. Check on neighbours or relatives who may need help.

Learn the signs of hypothermia and seek medical help if you are concerned. The Prepare guidance treats hypothermia as a medical emergency requiring hospital treatment.

Do not turn cooking equipment into a heater

Improvised combustion heating can be deadly. The NHS warns that barbecues and camping stoves used indoors can cause carbon monoxide to build up. Ovens and hobs are not room heaters either.

If you use any fuel-burning appliance, follow its instructions and keep equipment intended for outdoor use outdoors. An audible carbon monoxide alarm is an important household safety device where combustion appliances are present.

Build the winter layer before buying a heater

A sleeping bag, blanket, base layers, warm socks and a hat have no runtime limit. They also help during boiler failures that are not electrical. That makes passive warmth the sensible first investment. Powered heating is a much larger load and should only be considered after you understand the battery capacity and safe operating environment required.

Useful kit for this plan

Gear should support the plan, not replace it. These are relevant items from the main catalogue. Check the current listing and specification before buying.

Sources checked for this guide

We use public sources for the factual backbone and write the guide in our own words. Source pages can change, so the links below are the place to check current official advice.

Editorial review date: 17 September 2026. If an official source conflicts with this page, follow the official source.