Why winter fire safety starts before the first fire

Every year the same pattern repeats: the first cold snap arrives, stoves and heaters come out of summer storage, and within weeks fire services report a surge in home fires. Heating equipment is one of the most consistent fire starters on record. In the United States, fire departments respond to an average of about 37,365 home heating-equipment fires a year (2020–2024 average), accounting for 11% of all reported home fires and causing around 417 deaths, 1,260 injuries and $1.2 billion in property damage annually, according to the National Fire Protection Association. Nearly half of those fires — 46% — happen in just three months: December through February.

The picture is similar elsewhere. The US Fire Administration lists heating as the third-leading cause of residential building fires (7.9%), after cooking and careless behaviour. In London, firefighters attended 236 heating-related fires in 2024 alone, and portable heaters have caused 14 fatal fires in the capital over five years, with around 200 injuries since 2017, the London Fire Brigade reports. In Pakistan, Rescue 1122 issues winter advisories every year as families turn to gas heaters and wood or coal stoves — and a Sindh Rescue 1122 spokesperson has estimated that electrical short circuits are behind 80–90% of fires in Karachi, driven by overloaded systems and ageing wiring.

The encouraging part: heating fires are among the most preventable. Run through these five checks before you light the first fire of the season.

1. Sweep the chimney: creosote is the silent hazard

Burning wood or coal leaves a tar-like residue called creosote inside the chimney flue. Over time it hardens into a layer that can ignite into a chimney fire — intense, fast and able to crack flue liners. Creosote buildup is the leading cause of chimney fires, so the official advice is consistent: have the chimney inspected and cleaned by a qualified professional at least once a year, ideally before the heating season begins.

Between sweeps, burn only dry, seasoned wood — damp wood deposits far more creosote — and never burn rubbish, cardboard or treated timber. Use a sturdy metal screen on open fireplaces, and watch for warning signs: unusually smoky fires, a sooty smell when the fireplace is idle, or black, flaky deposits in the flue. Any of these means the sweep is overdue.

2. Give heat a one-metre zone

The single biggest cause of heating fires is equipment placed too close to things that burn. Space heaters and heating stoves make up about 30% of home heating fires — but they cause 73% of the deaths and 70% of the injuries from those fires, the NFPA reports. The difference is proximity: these appliances sit in living spaces, close to furniture, bedding, curtains and clothing.

The official rule is simple and repeated by every major fire service: keep a clear zone of at least 1 metre (3 feet) around every stove, heater and fireplace. Nothing combustible goes inside that ring — no drying laundry, no stacked cushions, no curtains, no piles of firewood. Heaters also need a stable, level surface; never place them on furniture or rugs that can trap heat. And always turn portable heaters off when you leave the room or go to sleep — an unattended heater is how most of these incidents begin.

3. Winter electrics: one heater, one socket

Electric heaters draw a lot of current, and winter is when household wiring is pushed hardest. Fire services warn against two habits in particular: plugging heaters into extension cords and daisy-chaining leads. Plug heaters directly into a wall outlet — extension cords can overheat and melt under sustained high load — and never plug one heater into another lead, or several high-draw appliances into one socket.

Older wiring makes the risk worse, which is part of why overloaded and outdated electrical systems are blamed for the large majority of urban fires in places like Karachi. Watch for warning signs: sockets that feel warm, plugs that spark, lights that dim when the heater kicks in, or a burning smell near outlets. If any of these appear, switch the heater off at the wall and have the wiring checked before using it again. And never use a gas oven or stovetop to heat the home — it is not designed for space heating and produces dangerous levels of carbon monoxide. For the full picture on gas appliances and CO, see our gas heater and geyser safety guide.

4. Never dry clothes on heaters

It is tempting on a cold, damp day — but draping wet clothes over a heater or radiator is one of the most common causes of winter house fires. Damp fabric insulates heat rather than letting it escape, the material can overheat within minutes, and once it smoulders it is almost impossible to notice until smoke fills the room. Fire services explicitly warn against it every winter.

Use a freestanding drying rack instead, well outside the one-metre zone. The same applies to curtains — keep them tied back or shortened so they cannot fall onto a heater — and keep bedding, blankets and upholstered furniture clear of stoves. Most winter heating fires start not from dramatic faults but from ordinary objects placed slightly too close.

5. Cool ashes completely

A fire that looks out is not necessarily out. Ashes and embers can stay hot enough to reignite for days after the last flame. Every winter, fires start when warm ash is tipped into a plastic bin, a cardboard box, or a pile of rubbish — or swept into a corner of a wooden shed.

The safe routine is strict: let ashes cool fully in the stove or fireplace, then transfer them with a metal shovel into a covered metal container. Store the container outside the house, on a non-combustible surface, well away from walls, fences and anything flammable — and keep it there for several days before final disposal. Never store ash in plastic or paper containers, even when it feels cool to the touch.

What our records show, and what they miss

On our trending page, fire consistently ranks among the most-reported incident categories worldwide — the live map logged around 1,470 fire incidents in the last 30 days alone, from structural and factory fires to residential blazes. Winter brings a visible seasonal shift in that data: as temperatures fall, residential fire reports climb, mirroring the official statistics that place nearly half of US heating fires in December through February.

But our records also miss a lot. Small home fires that are put out without a fire-service call rarely make the news, and chimney fires that are caught early almost never appear in any database. Near-misses — the scorched curtain, the overheated extension lead discovered in time — go entirely unrecorded. The official figures above are the reliable measure of the risk; our incident stream shows where the most serious cases land. For the other side of winter risk — what cold does to the body rather than the home — see our guide on hypothermia and frostbite.

The short version

  • Sweep the chimney every year before the heating season — creosote buildup is the leading cause of chimney fires.
  • Keep a 1-metre (3-foot) clear zone around every stove, heater and fireplace; nothing combustible inside it.
  • Plug heaters directly into the wall — never into extension cords or daisy-chained leads — and switch them off when you leave the room or sleep.
  • Never dry clothes on heaters; use a rack well away from heat, and keep curtains and furniture clear too.
  • Cool ashes fully in a covered metal container outside — embers can stay hot enough to reignite for days.