Photo: Félix Mathieu-Bégin · CC BY-SA 4.0Hazards in Trécesson are mild: low wildfire and earthquake risk, and 4.3% of area homes above the radon guideline
Wildfire is rare near Trécesson: 0% of the land within 25 km has burned since 1986, a burn rate of 0.001% a year. Earthquake risk in Trécesson is ordinary: NRCan’s model puts building losses at $0.022 a year per $1,000 of value, close to the typical town’s $0.030. Hazard risk gives Trécesson a grade of A−; its wildfire band pulls it down.
What stands out about Trécesson’s hazards
Four national sources, each read for Trécesson: earthquakes, radon, past fires and flood studies.
What Trécesson faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Trécesson: A−
The grade weighs Trécesson’s seismic risk and radon equally, and wildfire is one-sided: a high band counts against a town, a low one earns nothing.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. Only 69 homes were tested in the survey area, so the radon share is rough. Small fires and grass fires are largely missing from the national burned-area record.
Wildfire is rare near Trécesson: 0% of the land within 25 km burned since 1986, 0.1% within 5 km
Past fire around Trécesson’s homes, from the national burned-area record, with the fuel within 5 km.
The yearly burn rate around Trécesson is 0.001%, low beside 0.000% for the typical Canadian town.
Near or far, forest fuel covers a similar share around Trécesson: 56% within 5 km and 56% within 25 km.
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 Quebec · highest of 514
In the upper half in Quebec but far from Mistissini (0.31%): Trécesson ranks 136th of 514, at 0.001% a year.
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.
Some fire is mapped around Trécesson, but not enough to leave the low band, where 92% of Canada’s 2,610 towns are; 7.5% rank higher.
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 Trécesson
What Canada’s Flood Map Inventory lists for Trécesson: who studied flooding and where to see their maps.
No flood study on the national inventory covers Trécesson; ask the municipality, which is the authority for its flood maps.
Towns with a flood study on file
Mapping in Quebec reaches 45% of towns, below the 58% across Canada, and not Trécesson.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Flood mapping is shown for Trécesson to be opened and checked, never turned into a grade.
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.”
Expected shaking damage in Trécesson: $0.022 a year per $1,000
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
At $0.022 per $1,000, Trécesson’s earthquake risk is about the typical Canadian town’s ($0.030; 0.7 times).
Shaking damage a year per $1,000 of building value
Below the middle in Quebec: Trécesson’s $0.022 against a median of $0.14; La Pocatière has $0.48.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
Middle of the pack: 61% of Canada’s 2,611 towns have more earthquake risk than Trécesson.
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).
The loss is to Trécesson’s buildings alone, from ground shaking; infrastructure and secondary hazards are left out.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
Little radon around Trécesson: 4.3% of area homes over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline. · Area-wide: radon tests, counted over the Abitibi-Temiscamingue health region
Trécesson’s survey area reads 4.3% over the guideline, under the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Trécesson’s area, at 4.3%, is below the median in Quebec (8.2%).
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 Trécesson; 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.
One home in Trécesson can be high while next door is low; a three-month test settles it.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Trécesson
Alerts for Trécesson come from Environment and Climate Change Canada and, for emergencies, Alert Ready.
| 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. |
Alert Ready carries evacuation orders for Trécesson to phones; CWFIS shows the day’s fire danger.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
How Trécesson’s neighbours compare on hazards
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Trécesson | Low | $0.022 | 4.3% | None listed |
| Amos 12,773 · 12 km | Low | $0.021 | 4.3% | Yes |
| Saint-Félix-de-Dalquier 1,046 · 15 km | Low | $0.022 | 4.3% | None listed |
The fire record around Amos is a touch heavier than Trécesson’s, but the band is the same: low (here low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Trécesson faces
What to do about the hazards Trécesson 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 Trécesson until then.
- Wildfire counts one way. Wildfire is read from the national burned-area record around Trécesson’s homes since 1986, a history of fire that may lower Risk but never raises it.
- Earthquakes are modelled. NRCan models what earthquakes would cost buildings each year on average, subdivision by subdivision; Trécesson’s figure is its subdivision’s.
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Trécesson without grading them.
Questions about flooding and hazards in Trécesson
Is Trécesson at risk of wildfire?
Less than most of Canada: 0% of the land within 25 km of Trécesson has burned since 1986, the last in 2023, a low band that leaves Risk alone.
How is Trécesson’s Hazard risk Grade worked out?
Trécesson grades A− for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
Is radon a problem in Trécesson?
In Health Canada’s survey, 4.3% of 69 homes tested in Trécesson’s area were above 200 Bq/m³, though only a test tells you about one house.
How big is the earthquake risk in Trécesson?
NRCan’s model expects shaking to cost buildings in Trécesson $0.022 a year for every $1,000 of their value, on average over many years.
Does Trécesson flood?
Nothing is listed for Trécesson on the national inventory (0); local maps may still exist with the municipality.
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).