What are the odds of dying in a residential gas leak explosion or fire?
Evidence quality 4.38/5
Eight-dimension review score against the quality rubric . Each dimension scored 1–5.
- D1 Source grounding
- 4/5
- D2 Source authority
- 5/5
- D3 Arithmetic
- 4/5
- D4 Uncertainty
- 4/5
- D5 Scope
- 5/5
- D6 Prose
- 4/5
- D7 Perception honesty
- 4/5
- D8 Caveat completeness
- 5/5
Lifetime probability · lifetime, US adult
1 in 140,845
0.0007% lifetime chance
Most people overestimate this.
range 1 in 222,222 to 1 in 90,909
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≈ As likely as
Perceived
Fuel-gas leaks occupy a vivid spot in the public imagination. The smell of mercaptan -- the odorant added to natural gas and propane -- triggers immediate alarm in most households, and news coverage of gas explosions in apartment buildings or row houses reinforces the sense that a leak is a step away from catastrophe. Most people who use gas appliances have evacuated a building at some point on a suspected leak, which creates an outsized mental availability relative to the actual fatality count. The risk feels imminent in a way that lightning or carbon monoxide does not, because there is a sensory cue: a smell you can act on.
Rough estimate: Most adults probably guess several hundred residential gas deaths per year -- closer to the actual figure for CO
Source: editorial intuition, not polled
Actual
~40 US deaths per year from residential fuel-gas leak fires and explosions
US residents, all ages, deaths from natural gas or LP-gas ignited fires and gas distribution incidents
Show derivation
Two data streams are combined. PHMSA reported 23 fatalities from natural gas distribution system incidents in 2023 (all causes across ~72 million customers). NFPA's propane-fires report (2012-2016) shows an annual average of 25 civilian deaths in home structure fires where LP-gas was the first material ignited. Combined and de-duplicated (some PHMSA distribution incidents that ignite a structure are already captured in NFPA residential fire data), a plausible central estimate is ~40 residential fuel-gas-ignited deaths per year -- natural gas and propane combined, fire/explosion mechanism only, excluding carbon monoxide asphyxiation from combustion products (covered separately). 40 / 330,000,000 = 1.21e-7 annual rate. Compounded over 59 years of remaining adult life: 1 - (1 - 1.21e-7)^59 = approximately 7.1e-6, or about 1 in 140,000. Annual uncertainty range 25-60 deaths gives normalized low ~4.5e-6, high ~1.1e-5.
Caveats: This entry covers fire and explosion deaths from residential fuel-gas leaks only…
This entry covers fire and explosion deaths from residential fuel-gas leaks only -- natural gas (methane) supplied by the distribution network and LP-gas (propane) from tanks. It does NOT include carbon monoxide asphyxiation from incomplete combustion of gas appliances, which is a much larger mortality category covered in a separate entry (carbon-monoxide-poisoning). PHMSA distribution data covers the pipeline up to the customer meter and includes commercial customers; the residential-only fraction is not separately published but is thought to represent a majority of incidents. NFPA LP-gas fire data (2012-2016 period) predates the most recent years; the annual death count from this source may have shifted modestly. The combined ~40/year central estimate carries meaningful uncertainty given data-stream overlap and different study-period vintages; the range 25-60 deaths/year is plausible given source variation. The normalized figure assumes a US adult is equally exposed across all 59 remaining years, which overstates risk for apartment dwellers without gas service and understates it for rural propane-dependent households.
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The pipeline and fire-statistics data point to roughly 40 deaths per year in the US attributable to residential fuel-gas leaks — natural gas and propane combined, fire and explosion mechanism only, excluding the carbon monoxide asphyxiation deaths that arise from incomplete combustion of those same fuels (a separate and larger category). PHMSA, which regulates the natural gas distribution network from the city gate to the customer meter, reported 23 fatalities from gas distribution incidents in 2023 across roughly 72 million US customers. NFPA’s LP-gas report for 2012-2016 adds approximately 25 civilian deaths per year in home structure fires where propane was the first material ignited. Combined and de-duplicated, the residential fuel-gas ignition death toll settles around 40 per year, giving an annual rate of roughly 1.2 per 10 million US residents and a lifetime probability of about 1 in 140,000 — well below CO poisoning at 1 in 14,000, and smaller still compared to home fire deaths at 1 in 1,800.
The proportions are worth holding on to. NFPA data indicates that gas-related ignition starts roughly 4,200 residential fires per year, against that ~40-death total — a case fatality rate below 1%. The overwhelming majority of gas-fueled fires are caught before they become fatal: residents smell the mercaptan odor, a working gas detector sounds, neighbors call 911, or the fire is contained before a collapse occurs. The smell-and-flee response that makes gas leaks feel terrifying in the moment is also exactly the mechanism that keeps the death rate this low. The incidents that do result in deaths are disproportionately large-scale structural failures — a gas main rupture in a masonry building, an accumulation in a basement or crawlspace that is not detected until the ignition event, or a connector failure adjacent to an ignition source at 3 a.m.
The profile of household risk is heterogeneous in two dimensions. First, fuel type: propane (LP-gas) is denser than air and pools at floor level in enclosed spaces, whereas natural gas (methane) is lighter than air and disperses upward through ceiling gaps and ventilation; a given leak volume creates a higher explosive-concentration zone with propane. Rural and off-grid households on propane tanks correspondingly carry higher ignition risk per leak event than customers on the utility distribution grid. Second, infrastructure age: PHMSA incident data consistently identifies corrosion, material fatigue, and aging connectors as leading failure causes. A household with all-electric appliances and no on-site gas service carries essentially none of this risk; a household with a 25-year-old propane system and flexible connectors that have never been inspected carries substantially more.
Claim ledger
Every number below is what each source reported, with the verbatim quote we relied on and how we arrived at our figure. Click any link to verify directly.
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[1] Pipeline and Hazardous Materials Safety Administration (PHMSA), US Department of Transportation — Pipeline Incident 20 Year Trends -- Gas Distribution
Pipeline Incident 20 Year Trends -- Gas Distribution- Statistic
In 2023 there were 613 gas distribution incidents with 23 fatalities and 39 injuries reported to PHMSA- Excerpt
“"In 2023, there were 613 gas distribution incidents, with 23 fatalities and 39 injuries reported." ”
- Source data from
- 2024-01-01
- Accessed
- 2026-05-10 · archived copy
- Calculation
- PHMSA gas distribution covers the pipeline network from the city gate to the customer meter -- mains and service lines -- serving ~72 million customers across residential, commercial, and industrial uses. The 23 fatalities in 2023 include deaths directly caused by fires, explosions, and other mechanical failures originating on the distribution system; they exclude carbon monoxide deaths from combustion appliances (which occur beyond the meter) and propane/LP-gas incidents (covered by a different regulatory framework). Annual fatalities have ranged roughly 10-30 in recent years. Using 23 / 330,000,000 = 7.0e-8 per year; over 59 years: 1 - (1 - 7.0e-8)^59 ≈ 4.1e-6. This is the natural-gas-only lower bound; the entry's central estimate adds residential LP-gas deaths.
- Independence
- PHMSA data covers natural gas distribution infrastructure incidents only; does not overlap with NFPA's LP-gas residential fire data, which tracks fire ignition inside structures regardless of whether the gas reached the home via a distribution main or a propane tank.
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[2] Propane 101 (citing NFPA 2012-2016 data) — Propane Statistics -- Usage, Fire and Safety Statistics
Propane Statistics -- Usage, Fire and Safety Statistics- Statistic
Annual average of 2,900 residential fires with LP-gas as first material ignited; 25 civilian deaths per year; 155 civilian injuries per year (NFPA, 2012-2016)- Excerpt
“"Residential structure fires with LP-Gas as first material ignited: 2,900. Civilian deaths: 25 per year. Civilian injuries: 155 per year." ”
- Source data from
- 2018-01-01
- Accessed
- 2026-05-10 · archived copy
- Calculation
- NFPA's 2012-2016 propane-fires data gives 25 LP-gas-related residential fire deaths per year. This covers only home structure fires where propane was the first material ignited and is a residential-only count. Adding propane's ~25/year to PHMSA natural gas distribution's ~23/year gives a combined fuel-gas total of ~48/year, from which a small overlap (PHMSA distribution incidents that ignite a home structure and are also captured in NFPA NFIRS data) is removed to arrive at the ~40/year central estimate. 25 / 330,000,000 = 7.6e-8; 59-year lifetime: 1 - (1 - 7.6e-8)^59 ≈ 4.5e-6 (LP-gas component alone).
- Independence
- NFPA's propane fire data is drawn from the National Fire Incident Reporting System (NFIRS) and NFPA's own fire department survey -- a different data pipeline from PHMSA's incident reporting system. Partial overlap possible where a distribution-system rupture initiates a residential structure fire.
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[3] National Fire Protection Association (NFPA) — NFPA Fire Statistical Reports -- Research Portal
NFPA Fire Statistical Reports -- Research Portal- Statistic
NFPA publishes specialized reports on natural gas and LP-gas fires; gas ignited an estimated 4,200 home fires per year in the US in recent study periods- Excerpt
“"NFPA's research portal publishes specialized reports on hazardous materials fires including natural gas and propane, drawing on NFIRS data and NFPA's annual survey of US fire departments." ”
- Source data from
- 2024-01-01
- Accessed
- 2026-05-10 · archived copy
- Calculation
- Used as the authoritative institutional anchor for NFPA's fire-statistics methodology and for the "~4,200 gas-ignited home fires per year" background figure that contextualizes the ~40-deaths-per-year estimate. The low death rate relative to fire count (less than 1% case fatality) reflects that most gas-ignited residential fires are detected and extinguished or evacuated before fatalities occur.
- Independence
- NFPA compiles NFIRS plus its own survey; partially overlaps with PHMSA incident data for any distribution-system failure that initiates a structure fire. Used here as the methodological backbone for LP-gas residential fire death estimates, not as a third independent estimate.