![Église de Sainte-Dorothée . - [1920]](https://images.townratings.com/ca/town_images/57000106/fbaaa714f4bc0264c4c1.jpg)
Photo: Unknown Unknown · Public domainOn hazards, Sainte-Dorothée comes out behind 93% of Canadian towns
Since 1986 almost nothing has burned near Sainte-Dorothée: 0% of the land within 25 km, or 0.001% a year. Earthquakes add more: NRCan’s model puts building losses at $0.21 a year per $1,000 of value, against $0.030 for the typical town. In Health Canada’s survey, 12% of homes tested in the area exceeded 200 Bq/m³ (6.6% typical). Sainte-Dorothée grades D for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Sainte-Dorothée’s hazards
Four national sources, each read for Sainte-Dorothée: earthquakes, radon, past fires and flood studies.
What Sainte-Dorothée faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Sainte-Dorothée: D
Risk averages earthquakes and radon; wildfire joins only where it pulls the average down, so a town like Sainte-Dorothée with little fire nearby would get no credit for it.
Its place: #485 of 507 in Quebec and #2,507 of 2,589 Canadian towns.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. Small fires and grass fires are largely missing from the national burned-area record.
Few fires near Sainte-Dorothée: 0% within 5 km, 0% within 25 km
Fires mapped since 1986 around where Sainte-Dorothée’s residents live, and the fuel next to their homes.
Forty years of fire maps put Sainte-Dorothée at 0.001% a year, low next to the typical Canadian town’s 0.000%.
The 5 km ring around Sainte-Dorothée’s homes is clear of burns since 1986, the nearest 8.7 km out.
Around Sainte-Dorothée the forest is thin or far off: 0.4% of the land within 5 km and 2% within 25 km is forest fuel.
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
In the upper half in Quebec but far from Mistissini (0.31%): Sainte-Dorothée ranks 136th of 513, 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.
Beside 2,610 Canadian towns, Sainte-Dorothée reads low, with 92% of them; only 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.
2 flood studies cover Sainte-Dorothée, the newest from Communauté métropolitaine de Montréal
Flood studies whose area touches Sainte-Dorothée, from NRCan’s inventory, each linked to its owner.
For Sainte-Dorothée the inventory points to 2 studies, most recently Communauté métropolitaine de Montréal’s in 2008.
| Study | By | Year | Status |
|---|---|---|---|
| Montréal-Argenteuil-Deux-Montagnes-Vaudreuil-Soulanges | Communauté métropolitaine de Montréal | 2008 | final |
| Moulins-Thérèse-De-Blainville-Deux-Montagnes-Laval | Gouvernement du Québec | 2006 | final |
Towns with a flood study on file
Flood maps are thinner in Quebec, 45% of towns against 58% nationally, but Sainte-Dorothée has one.
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 Sainte-Dorothée.
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.”
Natural Resources Canada, Canada Flood Map Inventory; links go to each study’s owner.
High seismic risk in Sainte-Dorothée: $0.21 per $1,000 of buildings a year
NRCan’s seismic risk model: the damage shaking is expected to do to buildings each year, on average over many years.
At $0.21 per $1,000, Sainte-Dorothée carries roughly 6.9 times the typical Canadian town’s earthquake risk ($0.030).
Shaking damage a year per $1,000 of building value
Earthquake risk in Quebec peaks in La Pocatière ($0.48); Sainte-Dorothée, at $0.21, sits above the median of $0.14.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
Only 7.9% of Canada’s 2,611 towns expect more shaking damage than Sainte-Dorothée.
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 Sainte-Dorothée’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). · Area behind the earthquake risk figures: the city of Laval
Radon runs high around Sainte-Dorothée: 12% of tested homes over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline. · Shared with the rest of the Laval health region: radon tests
At 12% over the guideline, the area around Sainte-Dorothée beats the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
More homes top the guideline around Sainte-Dorothée (12%) than in the typical town in Quebec (8.2%); 0.9% went over 600.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
More high tests than most: Sainte-Dorothée sits in a band that only 22% of Canada’s 2,611 towns share, with 4.6% above.
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 Sainte-Dorothée; it can’t tell you your basement’s level.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Sainte-Dorothée
Environment and Climate Change Canada issues the weather alerts for Sainte-Dorothée; 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 Sainte-Dorothée 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 Sainte-Dorothée’s neighbours compare on hazards
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Sainte-Dorothée | Low | $0.21 | 12% | Yes |
| Pierrefonds-Est 38,928 · 2.2 km | Low | $0.20 | 6.8% | None listed |
| Dollard-Des Ormeaux 50,246 · 4.3 km | Low | $0.23 | 6.8% | None listed |
| Le Boisé Champêtre 37,891 · 4.7 km | Low | $0.21 | 12% | None listed |
| Laval-Ouest 11,034 · 4.9 km | Low | $0.21 | 12% | Yes |
| Fabreville 48,457 · 5.0 km | Low | $0.21 | 12% | Yes |
| Chomedey 81,813 · 6.1 km | Low | $0.21 | 12% | None listed |
Nowhere around Sainte-Dorothée burns more: Pierrefonds-Est, 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 Sainte-Dorothée faces
What to do about the hazards Sainte-Dorothée 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?
- Check the address on the flood map.
- 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 Sainte-Dorothée until then.
- Wildfire counts one way. Wildfire is read from the national burned-area record around Sainte-Dorothée’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; Sainte-Dorothée’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 Sainte-Dorothée without grading them.
Questions about flooding and hazards in Sainte-Dorothée
Is radon a problem in Sainte-Dorothée?
In Health Canada’s survey, 12% of 107 homes tested in Sainte-Dorothée’s area were above 200 Bq/m³, though only a test tells you about one house.
Is Sainte-Dorothée at risk of wildfire?
Less than most of Canada: 0% of the land within 25 km of Sainte-Dorothée has burned since 1986, the last in 2025, a low band that leaves Risk alone.
How is Sainte-Dorothée’s Hazard risk Grade worked out?
Sainte-Dorothée grades D for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
Does Sainte-Dorothée flood?
A flood study covers Sainte-Dorothée on Canada’s Flood Map Inventory; open the owner’s map to check a street, since flood isn’t graded.
How big is the earthquake risk in Sainte-Dorothée?
Expected earthquake damage in Sainte-Dorothée comes to $0.21 a year for each $1,000 that buildings are worth.
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).