Photo: P199 · CC BY-SA 4.0On hazards, Blainville comes out behind 88% of Canadian towns
Little of the land around Blainville has burned: 0% within 25 km since 1986, or 0.001% a year. Seismic risk runs high: $0.19 of expected damage per $1,000 of buildings a year, the typical town $0.030. Radon is higher than usual: 10% of tested homes in the survey area topped the guideline, against 6.6% for the typical town. Blainville grades D for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Blainville’s hazards
Four national sources, each read for Blainville: earthquakes, radon, past fires and flood studies.
What Blainville faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Blainville: D
Risk averages earthquakes and radon; wildfire joins only where it pulls the average down, so a town like Blainville with little fire nearby would get no credit for it.
Its place: #464 of 507 in Quebec and #2,460 of 2,589 Canadian towns.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. The radon share rests on 78 home tests in the survey area, so a few homes move it. Small fires and grass fires are largely missing from the national burned-area record.
Little of the land around Blainville has burned: 0% within 5 km, 0% within 25 km since 1986
Past fire around Blainville’s homes, from the national burned-area record, with the fuel within 5 km.
Forty years of fire maps put Blainville at 0.001% a year, low next to the typical Canadian town’s 0.000%.
Forest fuel is spread evenly around Blainville: 5.9% within 5 km, 8.4% 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 513
At 0.001% a year, Blainville ranks 136th of the 513 towns in Quebec; Mistissini leads at 0.31%.
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.
Blainville is in the low band with 92% of Canada’s 2,610 towns; 7.5% sit in moderate or 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 Blainville
What Canada’s Flood Map Inventory lists for Blainville: who studied flooding and where to see their maps.
There is no study for Blainville on the national flood inventory, which is far from complete.
Towns with a flood study on file
Blainville has no flood study on file; only 45% of towns in Quebec do, against 58% across Canada.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Flood is shown here, never graded: a study says where a map exists, not how many of Blainville’s homes stand in a flood zone.
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 Blainville $0.19 per $1,000 a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
At $0.19 per $1,000, Blainville carries roughly 6.3 times the typical Canadian town’s earthquake risk ($0.030).
Shaking damage a year per $1,000 of building value
The typical town in Quebec expects $0.14 a year; Blainville expects $0.19, and La Pocatière $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.
Blainville sits above most of Canada’s 2,611 towns on earthquake risk; 13% are higher.
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 model counts damage to Blainville’s buildings and their occupants from shaking only: not liquefaction, landslides, tsunami or fires after a quake.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
Radon runs high around Blainville: 10% of tested homes over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
A higher share than most: 10% of tested homes around Blainville, the typical Canadian town 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
More homes top the guideline around Blainville (10%) than in the typical town in Quebec (8.2%); 1.3% went over 600.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
One test in ten or more tops the guideline around Blainville, as in 22% of Canada’s 2,611 towns; 4.6% go 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.
The survey sampled homes around Blainville; it can’t tell you your basement’s level.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Area behind the radon tests figures: the Laurentides health region
Weather and fire alerts for Blainville
Environment and Climate Change Canada issues the weather alerts for Blainville; 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 Blainville 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 Blainville’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 |
|---|---|---|---|---|
| Blainville | Low | $0.19 | 10% | None listed |
| Sainte-Thérèse 27,253 · 3.8 km | Low | $0.20 | 10% | None listed |
| Mirabel 68,471 · 5.7 km | Low | $0.16 | 10% | Yes |
| Lorraine 9,721 · 6.4 km | Low | $0.18 | 10% | Yes |
| Rosemère 14,198 · 6.6 km | Low | $0.16 | 10% | Yes |
| Boisbriand 29,830 · 6.7 km | Low | $0.20 | 10% | Yes |
| Bois-des-Filion 10,666 · 8.1 km | Low | $0.13 | 10% | Yes |
Nowhere around Blainville burns more: Sainte-Thérèse, the closest rival, is low to its low.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Blainville faces
What to do about the hazards Blainville 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.
- Drop, cover and hold on.
- Strap the water heater down.
- Keep 72 hours of supplies.
- Has it had a radon test?
- Ask the municipality for flood maps.
- Are flood and wildfire insured?
- Is earthquake cover included?
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 Blainville until then.
- Earthquakes are modelled. NRCan models what earthquakes would cost buildings each year on average, subdivision by subdivision; Blainville’s figure is its subdivision’s.
- Wildfire counts one way. Wildfire is read from the national burned-area record around Blainville’s homes since 1986, a history of fire that may lower Risk but never raises it.
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Blainville without grading them.
Questions about flooding and hazards in Blainville
How is Blainville’s Hazard risk Grade worked out?
Hazard risk gives Blainville D, weighing earthquakes and radon and counting wildfire only against it.
Is radon a problem in Blainville?
In Health Canada’s survey, 10% of 78 homes tested in Blainville’s area were above 200 Bq/m³, though only a test tells you about one house.
Is Blainville at risk of wildfire?
Less than most of Canada: 0% of the land within 25 km of Blainville has burned since 1986, the last in 2025, a low band that leaves Risk alone.
How big is the earthquake risk in Blainville?
NRCan’s model expects shaking to cost buildings in Blainville $0.19 a year for every $1,000 of their value, on average over many years.
Does Blainville flood?
Nothing is listed for Blainville 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).