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Old wires, new fires: One in four house fires starts behind the walls

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Representational Photo by Max Kukurudziak on Unsplash

A quiet suburb, a chilly night, a heater left on. By morning, a garage in Williams Landing is reduced to blackened brick and twisted metal, and firefighters are hauling away propane tanks to prevent a second explosion. The story is familiar across Victoria: ordinary homes becoming sudden firegrounds—especially when the temperature drops.

Despite popular perception, summer is not when most fires strike. Winter is deadlier. Over the past decade, more Victorians have died in residential house fires than from bushfires, storms or floods combined. The cold months, especially June to August, see a spike in house fires driven by heating appliances, faulty wiring and quiet human error. It is, firefighters say, the state’s forgotten fire season.

Between 2014 and 2024, fire services attended over 32,000 residential fires across Victoria. And while overall incident numbers have ebbed and flowed, the data draws a consistent shape: kitchens by day, bedrooms by night. Cooking mishaps, faulty cables, flammable materials and overloaded appliances remain key culprits. But the danger is not evenly distributed. Certain suburbs and households bear the brunt—and the fire doesn’t just consume buildings. It exposes everything.

Old Wiring, New Hazards

Heating appliances are the seasonal accelerant. Gas heaters placed near curtains, electric blankets left switched on, or embers thrown from open fireplaces have all led to fatal fires. In 2023 alone, 87 house fires in Victoria were sparked by heating systems. A year earlier, it was 119. The message seems to be reaching some. But most fatal fires still occur at night while people sleep, often in homes without a working smoke alarm.

In July 2021, a gas heater in Dandenong ignited clothing and killed a child. Another fire in Laverton that same week claimed a woman’s life. These were not arson cases—just objects placed too close to heat, and no early warning.

Electrical fires are quieter. Often hidden behind plaster and timber, degraded wiring is now responsible for roughly a quarter of all residential fires. In 2017, these accounted for nearly $10 million in property damage. Victoria’s housing stock—especially in growth corridors like Wyndham and Casey—is increasingly being asked to handle loads it was never built for. Faulty switchboards, DIY renovations and overloaded outlets are behind dozens of call-outs. Meanwhile, homes from the 1950s and ’60s still operate on ageing circuits never designed for today’s digital life.

Then there’s the kitchen. It remains the state’s number one ignition zone. Around 37% of residential fires begin at the stove or oven. Grease fires, distracted cooking and forgotten pots lead the tally. Campaigns like “Don’t stop looking while you’re cooking” saw success in cutting incidents by 12% from 2016 to 2017. Still, complacency continues to cost homes, and sometimes lives.

The pandemic years introduced new patterns. With more people cooking and working from home, RACV Insurance saw both a rise in fire claims and a spike in fire severity. In 2020–21, there were 78 large insurance claims over $100,000 each. Eighteen of those were due to faulty electrical appliances—electric blankets, chargers, dryers. Cooking was the second leading cause. More hours at home meant more opportunity for domestic disasters.

There are new risks too. Lithium-ion battery fires, once a footnote, are now rising fast. An e-bike charging overnight in a Footscray apartment exploded in 2024, engulfing the flat and trapping two people, who escaped by jumping out a window. The flat lacked a working smoke alarm. Authorities now advise that e-bikes, scooters and battery packs never be charged near exit doors or on beds.

Green energy has its own fire risks. Faulty solar panels—specifically the DC isolators—caused 55 fires in 2022–23, up from 27 the year before. In many cases, poor installation allowed moisture into the system, sparking fires months or years later. A Mt Evelyn family lost their home when a seven-year-old isolator cracked and shorted on a hot day. Regulators have since issued urgent safety alerts.

Where Fires Burn Most

Victoria’s fire map tells a socio-economic story. Suburbs like Wyndham, Casey and Hume, full of new housing, account for a growing share of residential fires. Some of it is volume: more houses, more fires. But some of it is build quality. Even a tiny fraction of dodgy wiring or rushed installations in a large estate can trigger dozens of incidents.

Williams Landing, built almost from scratch over the past 15 years, has had several blazes in recent years. In 2021, a brick-veneer home was gutted; in 2025, a woman died in neighbouring Truganina. These suburbs are dense, filled with families, and may not yet have built up awareness around maintenance or alarm checks.

Older suburbs burn too, but for different reasons. Dandenong, with its mix of migrants and low-income housing, sees fires started by cigarettes, candles or dodgy LPG burners. Regional cities like Bendigo and Ballarat see spikes from wood heaters and chimney fires. Farmhouses catch alight from battery inverters or potbelly stoves. Geography, age and income all intersect. Where homes are older, or budgets tight, fire risk climbs.

The fatalities follow a pattern: the elderly, people living alone, residents with disabilities. Smoke inhalation claims lives before the flames do. On average, 18 people a year die in Victorian house fires. In roughly half those homes, there was no working alarm.

The authorities are adjusting. New rules mandate interconnected smoke alarms in every bedroom and living space. Energy Safe Victoria is cracking down on dodgy solar installs and running education campaigns on safety switches. CFA and FRV teams now run door-knock campaigns in fire-prone suburbs offering free alarms and safety checks.

And the message is clear: nearly all of this is preventable. Fires begin with dry lint, forgotten frypans, overworked cables or an ember tossed carelessly. But prevention begins with something just as ordinary—checking the alarm battery, cleaning the flue, unplugging the charger. Firefighters know that by the time the sirens blare, the damage is often done. The true frontline is the living room, the laundry, the kitchen bench. Where one small choice can stop the whole house from going up in flames.


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