24 Smoke Alarm Statistics for Ontario Homes (2026)
Cited data on how often smoke alarms are missing or dead when fires happen, how much a working alarm cuts the risk of dying, and what Ontario law requires in your home.
Nearly 3 in 5 home fire deaths (59%) happen in homes with no smoke alarm or one that did not work, according to the National Fire Protection Association (NFPA). A smoke alarm is a device that senses smoke and sounds a loud warning, so people can get out before a fire spreads. In Ontario, 127 people died in 112 fatal fires in 2025. The 24 statistics below cover how often alarms are missing or dead, how much a working one helps, and what Ontario law requires. If yours are old or missing, get quotes from screened local pros to replace them.
Fire performance figures come from the NFPA report Smoke Alarms in US Home Fires (June 2024, covering 2018 to 2022 fires), the largest current study of alarm performance in North America. Household survey figures come from the 2024 US Consumer Product Safety Commission (CPSC) survey as summarized by the NFPA. Ontario figures and rules come from the Government of Ontario and the Ontario Fire Marshal. All sources were checked on October 28, 2026.
Key Takeaways
- 127 Ontario fire deaths in 2025, in 112 fatal fires (Ontario Fire Marshal).
- 59% of home fire deaths happen with no alarm (43%) or an alarm that failed (16%) (NFPA).
- 60% lower death rate in homes with working smoke alarms (NFPA).
- 94% vs 85%: how often hardwired and battery-only alarms worked in a fire (NFPA).
- 33% of households never test their smoke alarms (CPSC via NFPA).
- CO alarms on every storey became the Ontario rule on January 1, 2026 (Government of Ontario).
How many people die in house fires in Ontario?
Ontario recorded 127 fire deaths in 112 fatal fires in 2025, and 77 more by the 2026 Test Your Smoke Alarm Day campaign. The Ontario Fire Marshal says most fatal fires happen in homes without working smoke alarms. Most fatal fires also happen at night, when people are asleep and may never wake up.
1. 127 people died in Ontario fires in 2025
Ontario had 112 fatal fires in 2025, and they killed 127 people. The Fire Marshal's office says Ontario continues to see a rise in residential fatal fires and fire deaths (Ontario Fire Marshal, via City of Windsor).
2. 77 more Ontario fire deaths by late September 2026
Ontario had recorded 77 fire fatalities in 2026 by the time of the September 28 Test Your Smoke Alarm Day campaign (Ontario Fire Marshal, via City of Windsor).
3. You may have less than 60 seconds to get out
Ontario Fire Marshal Jon Pegg says you might have less than 60 seconds to escape once your smoke alarm sounds (Ontario Fire Marshal, via City of Windsor).
4. Smoking is the No. 1 cause of fatal home fires in Ontario
The Government of Ontario names smoking as the number one cause of fatal home fires in the province. Unattended cooking and electrical equipment are also leading causes of home fires (Government of Ontario).
How much do working smoke alarms cut the risk of dying?
By about 60%. The NFPA found the death rate per 1,000 reported home fires was 60% lower in homes with working smoke alarms than in homes with none that worked. Yet alarms were present in only 74% of reported home fires, and 43% of home fire deaths happened where there was no alarm at all.
5. 59% of home fire deaths happen without a working alarm
Nearly three out of five home fire deaths (59%) in 2018 to 2022 came from fires with no smoke alarm (43%) or an alarm that failed to operate (16%) (NFPA).
Source: NFPA, Smoke Alarms in US Home Fires (2024). The 41% remainder is derived from the NFPA's 43% and 16% figures.
6. Working alarms cut the death rate by about 60%
The death rate per 1,000 home structure fires is about 60% lower in homes with working smoke alarms than in homes with no alarms or none that operated (NFPA).
7. Smoke alarms were present in 74% of reported home fires
Fire departments responded to an average of 336,848 home structure fires a year in 2018 to 2022, and smoke alarms were present in 74% of them (NFPA).
8. Alarms worked in 90% of fires big enough to set them off
When smoke alarms were present, they operated in 90% of reported fires large enough to activate them (NFPA).
9. A working alarm does not always wake people
Of the deaths in homes with working smoke alarms, 28% happened when the alarm failed to alert the people inside, and 9% when people were alerted but did not respond (NFPA). That is one reason Ontario requires an alarm outside every sleeping area.
Why do smoke alarms fail?
Mostly because of power. The NFPA says missing, disconnected or dead batteries and disconnected hardwired alarms were the most common reasons alarms failed. People often pull the battery to stop a low-battery chirp or a false alarm from cooking, then forget to put it back.
10. 19,119 fires a year where the alarm should have worked
US fire departments responded to an average of 19,119 home fires a year in 2018 to 2022 where smoke alarms should have operated but did not. Those fires caused an average of 403 deaths and 1,052 injuries a year (NFPA).
11. Battery problems are the top cause of failure
When smoke alarms failed to operate, the cause was most often a disconnected or non-working power source, and battery problems were the most common of those (NFPA).
12. Keep alarms at least 10 feet from the stove
NFPA 72, the US alarm code, says smoke alarms should be at least 10 feet from cooking appliances unless they are designed for that area. Within 10 to 20 feet, use a photoelectric alarm or one with a hush button (NFPA). Ontario also says to avoid putting smoke alarms too close to cooking and heating appliances, bathrooms, windows and ceiling fans (Government of Ontario).
Are hardwired smoke alarms better than battery alarms?
In fire data, yes. Hardwired alarms worked in 94% of fires big enough to set them off, against 85% for battery-only alarms. Homes with battery-only alarms also accounted for 66% of the deaths in homes that had alarms, while homes with hardwired alarms accounted for 29%.
13. Hardwired alarms worked 94% of the time
When present, hardwired smoke alarms operated in 94% of fires large enough to trigger them. Battery-only alarms operated 85% of the time (NFPA).
14. 66% of deaths in homes with alarms involved battery-only units
Battery-only alarms were present in 44% of reported fires in homes with smoke alarms but accounted for 66% of the deaths. Hardwired alarms were present in 50% of those fires and accounted for 29% of the deaths (NFPA).
Source: NFPA, Smoke Alarms in US Home Fires (2024). Based on presence of equipment, not whether it operated.
15. Hardwired alarms with battery backup cut the death rate 71%
Compared with homes with no smoke alarms or sprinklers, the death rate per 1,000 reported fires was 71% lower with hardwired alarms that have a battery backup, 67% lower with hardwired alarms and 30% lower with battery-only alarms (NFPA).
16. Alarms plus sprinklers cut the death rate 90%
When a smoke alarm and an automatic sprinkler system were both present, the death rate per 1,000 reported fires was 90% lower than with neither (NFPA). Ontario suggests thinking about residential sprinklers when you build or do a major renovation (Government of Ontario).
How do households use and test their alarms?
Almost every home has one, but many are not checked. The 2024 CPSC survey of 1,060 US households found 99% had at least one smoke alarm. Yet 61% tested them less than once a month and 33% never tested them. About 1 in 5 households may be at risk of not having a working alarm.
17. 99% of households have at least one smoke alarm
Nearly all US households (99%) have at least one smoke alarm, up from 88% in the 1994 survey (CPSC survey, via NFPA).
18. 1 in 5 households may lack a working alarm
16% of households that believed all their alarms worked had at least one alarm with a problem, such as a dead battery. CPSC researchers say this may mean 1 in 5 households (19%) are at risk of not having at least one working alarm (CPSC survey, via NFPA).
19. 33% never test their smoke alarms
Safety experts say to test smoke alarms at least once a month, but 61% of households test less often and 33% never test them (CPSC survey, via NFPA).
20. 29% do not know how to install a smoke alarm
29% of households said they did not know how to install smoke alarms, and 23% said they did not know how to maintain them. Only 51% were always right about the age of their alarms (CPSC survey, via NFPA).
21. 23% do not know what type of alarm they have
42% of households reported ionization smoke alarms, 29% photoelectric and 6% both types, while 23% did not know which type they had (CPSC survey, via NFPA). Ontario suggests having both types, since photoelectric alarms may catch slow, smouldering fires faster (Government of Ontario).
How common are carbon monoxide alarms?
Far less common than smoke alarms. Only 55% of households in the CPSC survey had at least one CO alarm, and 26% said they knew nothing at all about them. In Ontario, more than 65% of CO-related injuries and deaths happen in the home.
22. Only 55% of households have a CO alarm
Just 55% of households reported having at least one carbon monoxide alarm. 90% called smoke alarms "extremely necessary," but only 66% said the same about CO alarms (CPSC survey, via NFPA).
23. Over 65% of Ontario CO injuries and deaths happen at home
The Government of Ontario says over 65% of CO-related injuries and deaths in the province happen in the home. CO comes from fuel that does not burn fully in furnaces, fireplaces, water heaters, stoves and vehicles (Government of Ontario).
What does Ontario law require for smoke and CO alarms?
Every Ontario home must have a working smoke alarm on every storey and outside all sleeping areas. Since January 1, 2026, a house that needs CO alarms must also have one on every storey, not just beside the bedrooms. Breaking the smoke alarm rules can bring a $360 ticket or a fine of up to $50,000.
24. Fines reach $50,000 for individuals
Failing to meet the Fire Code smoke alarm rules can result in a $360 ticket or a fine of up to $50,000 for individuals or $100,000 for corporations. It is the homeowner's job to install and maintain the alarms, and the landlord's job in a rental (Government of Ontario).
- Smoke alarms: on every storey and outside all sleeping areas, on the ceiling if possible (Government of Ontario).
- CO alarms in a house: required with a fuel-burning appliance, a fireplace or an attached garage. Place one beside each sleeping area and, since January 1, 2026, on every storey (Government of Ontario).
- Upkeep: test monthly, change batteries at least once a year and replace smoke alarms every 10 years (Government of Ontario).
- Rentals: landlords must test alarms every year, after a battery change and at each change of tenancy, and tenants must report a broken alarm right away (Ontario Fire Marshal, via City of Windsor).
What should you do if your alarms are old or missing?
Replace any smoke alarm older than 10 years and add CO alarms to every storey if your home burns fuel. Battery and plug-in units are a quick handyman job. Hardwired alarms tie into your wiring, so use a licensed electrician, and consider units with a battery backup, which Ontario recommends.
- Book a safety visit. Our handyman statistics and handyman cost guide show what a small-jobs visit costs, so you can add alarms to a list of fixes.
- Check the wiring too. Our electrical safety statistics cover the Ontario wiring risks behind many home fires.
- Plan for aging in place. Our aging-in-place statistics cover the safety upgrades older homeowners make most.
- Start from a vetted list. Compare the best handymen in Toronto or the best electricians in Toronto, ranked on checked public data.
- Pro House Maintenance matches you with local pros who have passed WSIB, insurance, reference and background checks. Request free written quotes for alarm installs and other small jobs.
Frequently Asked Questions
How many people died in Ontario house fires in 2025?
Ontario had 112 fatal fires in 2025, and 127 people died, according to Ontario Fire Marshal figures shared in the 2026 Test Your Smoke Alarm Day campaign. The Fire Marshal says most fatal fires happen in homes that do not have working smoke alarms.
How much do smoke alarms reduce the risk of dying in a fire?
The death rate per 1,000 reported home fires is about 60% lower in homes with working smoke alarms than in homes with no alarm or none that worked, says the NFPA. With hardwired alarms that have a battery backup, the death rate was 71% lower than with no alarm.
Where are smoke alarms required in Ontario?
By law, every Ontario home must have a working smoke alarm on every storey and outside all sleeping areas. Homeowners must install and maintain them, and landlords are responsible in rentals. Breaking the rule can bring a $360 ticket or a fine of up to $50,000 for individuals.
What changed for carbon monoxide alarms in Ontario in 2026?
From January 1, 2026, a house that needs a CO alarm must have one on every storey, including storeys with no bedrooms, plus one beside each sleeping area. A house needs CO alarms if it has a fuel-burning appliance, a fireplace or an attached garage.
How often should you replace a smoke alarm?
Replace smoke alarms every 10 years, test them every month and change the battery at least once a year, says the Government of Ontario. A survey cited by the NFPA found 33% of households never test their smoke alarms.
Who can install smoke and CO alarms for me?
A handyman can mount battery and plug-in alarms, and hardwired units that tie into your wiring are a job for a licensed electrician. Pro House Maintenance is free for homeowners and matches you with local pros who have passed WSIB, insurance, reference and background checks.