Photo: Roncanada · CC BY 4.0Wildfire low, radon 6.8%: how Dollard-Des Ormeaux stands on hazards
The burned-area map is nearly blank around Dollard-Des Ormeaux, 0% within 25 km since 1986, 0.001% a year. Seismic risk runs high: $0.23 of expected damage per $1,000 of buildings a year, the typical town $0.030. Dollard-Des Ormeaux grades C for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Dollard-Des Ormeaux’s hazards
Four national sources, each read for Dollard-Des Ormeaux: earthquakes, radon, past fires and flood studies.
What Dollard-Des Ormeaux faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Dollard-Des Ormeaux: C
The grade weighs Dollard-Des Ormeaux’s seismic risk and radon equally, and wildfire is one-sided: a high band counts against a town, a low one earns nothing.
Its place: #246 of 507 in Quebec and #2,197 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. Small fires and grass fires are largely missing from the national burned-area record.
Wildfire is rare near Dollard-Des Ormeaux: 0% of the land within 25 km burned since 1986, 0% within 5 km
Past fire around Dollard-Des Ormeaux’s homes, from the national burned-area record, with the fuel within 5 km.
Next to the typical Canadian town (0.000% a year), Dollard-Des Ormeaux’s 0.001% is in the low band.
No fire has burned within 5 km of Dollard-Des Ormeaux’s homes since 1986; the nearest burn is 12 km away.
Little near Dollard-Des Ormeaux’s homes can carry a forest fire; only 0.4% of the land within 5 km is forest fuel, and 2% 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
Dollard-Des Ormeaux sits mid-table in Quebec: 136th of 513 towns, at 0.001% a year, well behind Mistissini (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.
Beside 2,610 Canadian towns, Dollard-Des Ormeaux 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.
The flood map inventory lists nothing for Dollard-Des Ormeaux
What Canada’s Flood Map Inventory lists for Dollard-Des Ormeaux: who studied flooding and where to see their maps.
No flood study on the national inventory covers Dollard-Des Ormeaux; ask the municipality, which is the authority for its flood maps.
Towns with a flood study on file
No study touches Dollard-Des Ormeaux; in Quebec, 45% of towns have one, below Canada’s 58%.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Flood studies don’t enter the grade; they are listed so you can open the official map for Dollard-Des Ormeaux.
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.”
High seismic risk in Dollard-Des Ormeaux: $0.23 per $1,000 of buildings a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
The typical town loses $0.030 a year to shaking; Dollard-Des Ormeaux loses $0.23, 7.5 times as much.
Shaking damage a year per $1,000 of building value
At $0.23, Dollard-Des Ormeaux is above the typical town in Quebec ($0.14); La Pocatière has the most at $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.
Dollard-Des Ormeaux is in the top tenth of Canada’s 2,611 towns for earthquake risk; 7.3% rank 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 loss is to Dollard-Des Ormeaux’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).
Radon about average around Dollard-Des Ormeaux: 6.8% 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 Montreal health region
Near the middle for radon: Dollard-Des Ormeaux’s area 6.8%, the typical Canadian town 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Radon around Dollard-Des Ormeaux is ordinary for towns in Quebec: 6.8%, beside a median of 8.2%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
26% of Canada’s 2,611 towns have more homes over 200 Bq/m³ than Dollard-Des Ormeaux’s 5–10% band, which holds 37%.
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 survey sample isn’t a map: any home in Dollard-Des Ormeaux can be high, and a three-month test is the only way to know.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Dollard-Des Ormeaux
Alerts for Dollard-Des Ormeaux 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. |
Fire danger and active fires near Dollard-Des Ormeaux are mapped daily by the Canadian Wildland Fire Information System; evacuation orders come from the municipality or province.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
How Dollard-Des Ormeaux’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 |
|---|---|---|---|---|
| Dollard-Des Ormeaux | Low | $0.23 | 6.8% | None listed |
| Pierrefonds-Est 38,928 · 2.0 km | Low | $0.20 | 6.8% | None listed |
| Pointe-Claire 37,437 · 3.6 km | Low | $0.19 | 6.8% | Yes |
| Sainte-Dorothée 38,183 · 4.3 km | Low | $0.21 | 12% | Yes |
| L'Île-Bizard–Sainte-Geneviève 18,885 · 5.1 km | Low | $0.20 | 6.8% | Yes |
| Pierrefonds-Ouest 30,978 · 5.2 km | Low | $0.20 | 6.8% | Yes |
| Kirkland 19,696 · 5.9 km | Low | $0.20 | 6.8% | Yes |
Among its neighbours Dollard-Des Ormeaux has the most fire on record (low); Pierrefonds-Est follows (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Dollard-Des Ormeaux faces
What to do about the hazards Dollard-Des Ormeaux 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
- Earthquakes are modelled. NRCan models what earthquakes would cost buildings each year on average, subdivision by subdivision; Dollard-Des Ormeaux’s figure is its subdivision’s.
- Radon is a survey. The radon share comes from about 14,000 long-term home tests in 2009–2011, pooled for now by the 2007 health region Dollard-Des Ormeaux sits in.
- Wildfire counts one way. Wildfire is read from the national burned-area record around Dollard-Des Ormeaux’s homes since 1986, a history of fire that may lower Risk but never raises it.
- Flood studies aren’t flood zones. A study’s area can be a whole watershed or province, so being on the inventory says a map exists, not that a home in Dollard-Des Ormeaux floods.
Questions about flooding and hazards in Dollard-Des Ormeaux
Is radon a problem in Dollard-Des Ormeaux?
Around Dollard-Des Ormeaux, 74 survey homes were tested and 6.8% came in over 200 Bq/m³, a guide to the area, not to any one home.
Is Dollard-Des Ormeaux at risk of wildfire?
Fire has reached 0% of the land around Dollard-Des Ormeaux since 1986 (last in 2025); at low, it neither helps nor hurts the grade.
Does Dollard-Des Ormeaux flood?
With 0 studies on the inventory, Dollard-Des Ormeaux’s flood risk is unmapped nationally; check with the municipality before buying.
How is Dollard-Des Ormeaux’s Hazard risk Grade worked out?
Dollard-Des Ormeaux grades C for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
How big is the earthquake risk in Dollard-Des Ormeaux?
NRCan’s model expects shaking to cost buildings in Dollard-Des Ormeaux $0.23 a year for every $1,000 of their value, on average over many years.
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).