Photo: Richard Eriksson from Toronto, Canada · CC BY 2.0Hazards in Trinity-Bellwoods are mild: low wildfire and earthquake risk, and 2.7% of area homes above the radon guideline
Since 1986 almost nothing has burned near Trinity-Bellwoods: 0% of the land within 25 km, or 0.000% a year. Shaking is about as much of a worry in Trinity-Bellwoods as in most places, at $0.043 a year per $1,000 of building value ($0.030 typical). Trinity-Bellwoods grades A− for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Trinity-Bellwoods’s hazards
For Trinity-Bellwoods, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Trinity-Bellwoods faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Trinity-Bellwoods: A−
Risk averages earthquakes and radon; wildfire joins only where it pulls the average down, so a town like Trinity-Bellwoods with little fire nearby would get no credit for it.
Its place: #285 of 866 in Ontario and #700 of 2,589 Canadian towns.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. Only 74 homes were tested in the survey area, so the radon share is rough. The burned-area record misses fires under about 10 ha and most grass and farm fires.
Wildfire is rare near Trinity-Bellwoods: 0% of the land within 25 km burned since 1986, 0% within 5 km
Past fire around Trinity-Bellwoods’ homes, from the national burned-area record, with the fuel within 5 km.
With 0.000% burned a year, Trinity-Bellwoods is among the many low-band places (the typical Canadian town 0.000%).
Forest makes up 0.6% of the land within 5 km of Trinity-Bellwoods and 0.5% within 25 km, little for a forest fire to run through.
Shares of land within 5 and 25 km of populated blocks: burned at least once in 1986–2025 (CWFIS burned-area composite), forest fuel and grass (fire behaviour fuel types, 2026, 250 m grid).
Burn rate a year, towns in Ontario · highest of 871
To three decimals the burn rate around Trinity-Bellwoods is zero, as for 638 of the 871 towns in Ontario, while Sioux Lookout reaches 0.16%.
Each bar: the yearly average share of land within 25 km of a town’s homes that burned, 1986–2025 (CWFIS); the seven highest towns of 2,500 people or more.
Trinity-Bellwoods shares the low band with 92% of Canada’s 2,610 towns, its burn rate rounding to nothing; 7.5% burn faster.
Bands of the yearly burn rate: low under 0.05%, moderate under 0.25%, high under 1%, very high 1% or more; towns of 2,500 people or more.
Fire danger and active fires (CWFIS)
Canadian Wildland Fire Information System: National Burned Area Composite 1986–2025 and fire behaviour fuel types (2026), Natural Resources Canada. Measured within 25 km and 5 km of each populated dissemination area; past fire, not a forecast.
The flood map inventory lists nothing for Trinity-Bellwoods
What Canada’s Flood Map Inventory lists for Trinity-Bellwoods: who studied flooding and where to see their maps.
Nationally, Trinity-Bellwoods has no listed flood study; the municipality is the place to ask.
Towns with a flood study on file
Missing from a well-mapped province: Trinity-Bellwoods has no study, where 69% of towns in Ontario have one against 58% nationally.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Nothing here counts toward Risk; the studies are pointers to the maps their owners keep for Trinity-Bellwoods.
The inventory’s own caution (NRCan): “The Canada Flood Map (CFM) does not include every flood hazard map in Canada and may be incomplete or contain inaccuracies. It should not be relied upon as the official source of flood mapping information. Furthermore, if a map appears to be missing, this does not necessarily mean that the area has never been mapped. For the official version of a map, updated information, or confirmation of applicable regulations, please contact the local authority responsible for flood mapping.”
Earthquakes cost buildings in Trinity-Bellwoods $0.043 per $1,000 a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
Trinity-Bellwoods’ $0.043 is close to the typical town’s $0.030 (1.4 times as much).
Shaking damage a year per $1,000 of building value
Earthquake risk around Trinity-Bellwoods ($0.043) matches the middle in Ontario ($0.043), far from Alexandria’s $0.21.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
Neither high nor low for Canada: 36% of the 2,611 towns expect more damage than Trinity-Bellwoods.
Each column: the share of Canada’s towns of 2,500 people or more in that range of yearly loss per $1,000 (NRCan, 2022).
What a quake does after the shaking, fire, landslides, tsunami, falls outside NRCan’s figure for Trinity-Bellwoods.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean). · Earthquake risk: the city of Toronto
Little radon around Trinity-Bellwoods: 2.7% of area homes over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
Trinity-Bellwoods’ area, at 2.7%, is below the 6.6% of the typical Canadian town, though any one home can still be high. Trinity-Bellwoods shares its radon tests numbers with the rest of the City of Toronto Health Unit.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Against the typical town in Ontario (4%), the area around Trinity-Bellwoods has fewer high tests: 2.7%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
The quietest radon band, under 5%, holds 37% of Canada’s 2,611 towns and Trinity-Bellwoods; 63% sit higher.
Each bar: the share of Canada’s towns of 2,500 people or more whose survey area had that share of tests over 200 Bq/m³.
A low area share in Trinity-Bellwoods doesn’t clear a house, nor does a high one condemn it: test.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Where to get warnings in Trinity-Bellwoods
Environment and Climate Change Canada issues the weather alerts for Trinity-Bellwoods; Alert Ready carries the urgent ones to phones, radio and TV.
| Alert | What it means |
|---|---|
| Warning | Severe weather is happening or about to: act now. |
| Watch | Conditions favour severe weather: be ready. |
| Advisory | Weather that is less severe but could disrupt the day. |
| Special weather statement | Unusual weather worth knowing about. |
| Special air quality statement | Poor air, often wildfire smoke. |
Smoke and fire warnings for Trinity-Bellwoods come through Environment Canada and Alert Ready; the fire map is CWFIS’s.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
How Trinity-Bellwoods’ neighbours compare on hazards
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Trinity-Bellwoods | Low | $0.043 | 2.7% | None listed |
| Palmerston-Little Italy 13,171 · 0.8 km | Low | $0.043 | 2.7% | None listed |
| West Queen West 13,599 · 1.0 km | Low | $0.043 | 2.7% | None listed |
| Little Portugal 15,669 · 1.0 km | Low | $0.043 | 2.7% | None listed |
| University 7,595 · 1.4 km | Low | $0.043 | 2.7% | None listed |
| Dufferin Grove 11,276 · 1.6 km | Low | $0.043 | 2.7% | None listed |
| Kensington-Chinatown 18,597 · 1.8 km | Low | $0.043 | 2.7% | None listed |
Among its neighbours Trinity-Bellwoods has the most fire on record (low); Palmerston-Little Italy follows (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Trinity-Bellwoods faces
What to do about the hazards Trinity-Bellwoods faces, and what to ask before you buy.
- Test for three months in winter.
- Over 200 Bq/m³: fix it.
- Kits are cheap; pros test too.
- Never drive through floodwater.
- Move papers and medicines upstairs.
- Ask whether your street is mapped.
- Clear needles and wood nearby.
- Keep a grab-and-go bag ready.
- In smoke, stay in; filter air.
- Has it had a radon test?
- Ask the municipality for flood maps.
- Are flood and wildfire insured?
What this data can and can’t tell you
- Radon is a survey. Radon figures pool the survey’s home tests by area: postal areas once their boundaries arrive, the 2007 health region around Trinity-Bellwoods until then.
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Trinity-Bellwoods’ census subdivision (a neighbourhood shows its city’s).
- Wildfire counts one way. For Trinity-Bellwoods, wildfire means how much nearby land burned in the past forty years, a one-way input that can pull Risk down and nothing more.
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Trinity-Bellwoods without grading them.
Questions about flooding and hazards in Trinity-Bellwoods
How is Trinity-Bellwoods’s Hazard risk Grade worked out?
Trinity-Bellwoods grades A− for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
How big is the earthquake risk in Trinity-Bellwoods?
NRCan’s model expects shaking to cost buildings in Trinity-Bellwoods $0.043 a year for every $1,000 of their value, on average over many years.
Does Trinity-Bellwoods flood?
Nothing is listed for Trinity-Bellwoods on the national inventory (0); local maps may still exist with the municipality.
Is Trinity-Bellwoods at risk of wildfire?
Hardly at all on record: 0% of the land within 25 km of Trinity-Bellwoods since 1986, a low band, though small grass fires aren’t mapped.
Is radon a problem in Trinity-Bellwoods?
In Health Canada’s survey, 2.7% of 74 homes tested in Trinity-Bellwoods’ area were above 200 Bq/m³, though only a test tells you about one house.
Seismic risk: Natural Resources Canada. Radon: Health Canada. Wildfire: Canadian Wildland Fire Information System. Flood studies: Natural Resources Canada, Canada Flood Map Inventory. Contains information licensed under the Open Government Licence – Canada.
Sources: NRCan, Canada’s Seismic Risk Model 2022 · Health Canada, Cross-Canada Survey of Radon Concentrations in Homes · CWFIS, National Burned Area Composite and FBP fuel types · NRCan, Canada Flood Map Inventory. Under the Statistics Canada Open Licence.
Adapted from Statistics Canada (Census of Population 2021, population estimates 2025, 2021 census boundaries) under the Statistics Canada Open Licence; this does not constitute an endorsement by Statistics Canada. Neighbourhood names in some cities © OpenStreetMap contributors (ODbL).