Power outage safety starts before the lights go out

On the night of 13–14 October, Russia struck Ukraine's energy infrastructure in Kyiv, the Kyiv region and Kharkiv with one of the war's largest combined missile-and-drone attacks. Officials said at least 600,000 people lost electricity, and warned outages could spread — as this site reported in Russia Hits Kyiv and Kharkiv Energy Grid: What We Know. It is a sharp reminder that electricity, which most of us treat as guaranteed, can disappear at the start of winter.

In Ireland, Storm Éowyn in January 2025 knocked out electricity for about 768,000 customers at its peak, per ESB Networks — and some 75,000 were still without power more than a week later. In Pakistan, recent reporting suggested three to four hours of daily load-shedding, though those figures trace to a single report and should be treated as a peg rather than a certainty.

The point is not to predict the next blackout but to be ready. The guidance below follows official sources — Ready.gov, FoodSafety.gov, the National Fire Protection Association, the CDC and NHS cold-weather guidance — and covers the household decisions that keep a blackout safe.

Light the house safely: torches beat candles

The National Fire Protection Association's 2025 research found that candles started at least 5,830 US home fires a year (2019–2023 averages), causing an average of 70 deaths, 570 injuries and $270 million in damage. December is the peak month, and the NFPA advises using battery-operated candles instead — and never leaving a lit candle unattended.

Ready.gov's guidance is simpler still: have flashlights for every household member. Put a torch in each bedroom with spare batteries, and agree their locations before you need them in the dark. Our Winter Fire Safety: 5 Checks Before You Light Your First Stove covers heating fires in detail — the same habits prevent most candle fires too.

When the fridge dies: the 2-hour, 4-hour and 48-hour rules

The moment the power fails, the clock starts on your food. Three official numbers are worth memorising:

  • The 4-hour rule: your refrigerator keeps food safe for up to 4 hours with the door closed. After that, discard refrigerated perishables — meat, poultry, fish, eggs and leftovers.
  • The 2-hour rule: discard perishables kept above 40°F (4°C) for 2 hours or more (1 hour above 90°F/32°C): meat, eggs, milk, soft cheese, cut fruit and vegetables, cooked pasta and rice, casseroles. Hard cheeses, butter, uncut fruit and vegetables, and breads are safe to keep.
  • The 48-hour rule: a full freezer holds a safe temperature for about 48 hours (24 hours if half full and the door stays closed). Food may be safely refrozen if it still contains ice crystals or is at 40°F (4°C) or below.

Keep an appliance thermometer in the fridge and freezer, and never taste food to check its safety — FoodSafety.gov's rule is "When in Doubt, Throw it Out." In a long outage, move perishables into a cooler with ice.

Stay warm without unsafe heating

Cold is the real killer in a winter blackout, and the temptation is to improvise heat. Ready.gov's rule is explicit: do not use a gas stove or oven to heat your home — it raises the risk of carbon monoxide poisoning, fires and burns. Generators must run outdoors, at least 20 feet from windows, doors and attached garages, with battery CO detectors on every level. The CDC adds that fuel-burning devices should never be used inside a home, garage or camper — or outside near an open window.

Carbon monoxide is odourless and colourless, and kills without warning: the CDC reports more than 400 Americans die each year from unintentional CO poisoning not linked to fires, with more than 100,000 visiting emergency departments. This site's gas heater safety guide covers the full picture — heaters left on overnight, bathroom geysers and the warning signs.

For ordinary warmth, NHS guidance is around 18°C in the bedroom and 21°C in the living room. Heat one room and keep everyone in it — blankets and layered clothing do the rest. If the outage will not end soon, go to a community location with power.

Keep phones charged and information flowing

A dead phone in a blackout means no warnings or emergency calls. Ready.gov recommends a portable charger or power bank, kept charged. Charge everything when storms or grid strain are announced, keep the car's fuel tank full, and never run the car inside a garage.

Keep a paper copy of your family's communications plan and a battery radio — phone networks can fail in wide outages, and paper needs no charging. When power returns, disconnect electronics against surges as the supply comes back.

Check on the people a blackout hurts most

Outages inconvenience most households and endanger some. Anyone dependent on powered medical devices or refrigerated medicines should arrange a backup plan with their medical provider now. Older adults face particular risk: the CDC warns hypothermia can occur even at cool temperatures if a person is wet or chilled.

Know the signs and treat them as an emergency: shivering, exhaustion, confusion, fumbling hands, memory loss, slurred speech and drowsiness — and below 95°F (35°C) body temperature, the CDC says to get medical attention immediately. Check on elderly neighbours during extended outages — the quiet danger of a winter blackout is a frail person alone in a cold room. Our Hypothermia and Frostbite: A Winter Traveller's Safety Guide explains the warning signs and safe rewarming in detail.

The one-page outage kit checklist

Assemble this now, in one bag or one cupboard:

  • Light: a flashlight for every household member, plus spare batteries — and battery candles as substitutes for real ones.
  • Power: a charged portable charger or power bank.
  • Food and water: non-perishable food, drinking water, a cooler and ice.
  • Warmth: extra clothing, blankets and sleeping bags; a full car fuel tank.
  • Health: prescription medication, first aid supplies, and a provider backup plan for power-dependent devices.
  • Detection: battery CO detectors on every level of the home.
  • Information: a battery radio, a paper copy of your comms plan, and some cash.
  • Generators: only outdoors, at least 20 feet from windows, doors and garages.

What our records show, and what they miss

Our records capture outage events as they make the news: the strikes on an energy grid, the storm that darkens three-quarters of a million homes. Storm Éowyn showed how long restoration can take — roughly 70% of Irish customers back within 72 hours, about 90% within a week, tens of thousands waiting longer. The 14 October strikes on Ukraine's grid show the other end of the scale: outages imposed deliberately at winter's start, when every hour without heat matters more.

What the records miss is almost everything at household level: the families who opened the fridge door once too often, the elderly neighbours alone in cold rooms, the near-miss generator run indoors that nobody reported. Official statistics capture the verified disasters — the most important work happens before anyone is counted.

The short version

  • Light with batteries, not flames: candles cause at least 5,830 US home fires a year — keep a torch per person and use battery candles.
  • Food has a clock: fridge food stays safe 4 hours (door closed); discard perishables held above 4°C for 2+ hours; a full freezer holds 48 hours — when in doubt, throw it out.
  • Never improvise heating: no gas stoves or ovens for heat, generators outdoors at least 20 feet from the house, battery CO detectors on every floor.
  • Charge, inform, check: keep a power bank charged, keep a paper comms plan, and check on elderly neighbours and anyone relying on powered medical devices.
  • Build the kit now: torches, batteries, power bank, water, non-perishable food, blankets, medication, cash, first aid — one bag, one cupboard.