Photo: Judicieux · CC BY-SA 4.0Parc-Extension’s hazards at a glance: a low wildfire record and 6.8% of area homes over the radon guideline
Burn scars are few around Parc-Extension, with 0.1% of the land within 25 km touched by fire since 1986 (0.001% a year). Earthquakes add more: NRCan’s model puts building losses at $0.20 a year per $1,000 of value, against $0.030 for the typical town. Hazard risk gives Parc-Extension a grade of C, from earthquakes and radon alone.
What stands out about Parc-Extension’s hazards
Four national sources, each read for Parc-Extension: earthquakes, radon, past fires and flood studies.
What Parc-Extension faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Parc-Extension: C
Risk averages earthquakes and radon; wildfire joins only where it pulls the average down, so a town like Parc-Extension with little fire nearby would get no credit for it.
Its place: #161 of 507 in Quebec and #2,110 of 2,589 Canadian towns.
How sure: Earthquake losses are a model’s expectation over many years, not a forecast for any one. The radon share rests on 74 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.
Wildfire is rare near Parc-Extension: 0.1% of the land within 25 km burned since 1986, 0% within 5 km
Fires mapped since 1986 around where Parc-Extension’s residents live, and the fuel next to their homes.
Low: the land around Parc-Extension burns at 0.001% a year, where the typical Canadian town sees 0.000%.
Since 1986 the nearest fire to Parc-Extension’s homes came within 14 km, never inside 5 km.
Around Parc-Extension the forest is thin or far off: 0.1% of the land within 5 km and 0.9% 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
Parc-Extension 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.
Parc-Extension 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.
No flood study is listed for Parc-Extension
Flood studies whose area touches Parc-Extension, from NRCan’s inventory, each linked to its owner.
Nationally, Parc-Extension has no listed flood study; the municipality is the place to ask.
Towns with a flood study on file
Mapping in Quebec reaches 45% of towns, below the 58% across Canada, and not Parc-Extension.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Listed, not scored: a flood study proves a map exists, not that Parc-Extension floods.
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 Parc-Extension $0.20 per $1,000 a year
NRCan’s seismic risk model: the damage shaking is expected to do to buildings each year, on average over many years.
The typical town loses $0.030 a year to shaking; Parc-Extension loses $0.20, 6.7 times as much.
Shaking damage a year per $1,000 of building value
Above the middle in Quebec: Parc-Extension’s $0.20 against a median of $0.14, with La Pocatière highest 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.
Only 8.5% of Canada’s 2,611 towns expect more shaking damage than Parc-Extension.
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 Parc-Extension’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). · Earthquake risk published for the city of Montréal, not by town
6.8% of homes tested around Parc-Extension are over the radon guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline. · Measured across the Montreal health region: radon tests
Parc-Extension’s area sits close to the typical Canadian town: 6.8% over the guideline, against 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Parc-Extension’s area, at 6.8%, is close to 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.
Parc-Extension is in the 5–10% band with 37% of Canada’s 2,611 towns; 26% have more.
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 Parc-Extension 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 Parc-Extension
Alerts for Parc-Extension 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. |
Evacuation orders for Parc-Extension come from the municipality or the province, while CWFIS maps fire danger every day.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Parc-Extension
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Parc-Extension | Low | $0.20 | 6.8% | None listed |
| Parc-Jarry 15,699 · 1.1 km | Low | $0.20 | 6.8% | None listed |
| Saint-Édouard 16,771 · 1.8 km | Low | $0.20 | 6.8% | None listed |
| Mont-Royal 22,821 · 1.9 km | Low | $0.22 | 6.8% | None listed |
| Crémazie 29,907 · 1.9 km | Low | $0.20 | 6.8% | None listed |
| Outremont 24,629 · 2.0 km | Low | $0.20 | 6.8% | None listed |
| Parc-Kent 27,291 · 2.4 km | Low | $0.20 | 6.8% | None listed |
The fire record around Parc-Jarry is a touch heavier than Parc-Extension’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 Parc-Extension faces
What to do about the hazards Parc-Extension 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
- Flood studies aren’t flood zones. The flood inventory points to maps; it is incomplete and not the official source, so ask the municipality about any street in Parc-Extension.
- Radon is a survey. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Parc-Extension takes its 2007 health region’s share.
- Wildfire counts one way. The wildfire figure is the share of land within 25 km of Parc-Extension’s homes burned each year from 1986 to 2025, past fire rather than a forecast, and it can only lower Risk.
- Earthquakes are modelled. Shaking damage is modelled from the ground, the buildings and the odds of each quake, and published for whole subdivisions such as Parc-Extension’s.
Questions about flooding and hazards in Parc-Extension
Is Parc-Extension at risk of wildfire?
Fire has reached 0.1% of the land around Parc-Extension since 1986 (last in 2025); at low, it neither helps nor hurts the grade.
Does Parc-Extension flood?
With 0 studies on the inventory, Parc-Extension’s flood risk is unmapped nationally; check with the municipality before buying.
How big is the earthquake risk in Parc-Extension?
About $0.20 a year per $1,000 of building value, NRCan’s long-run expectation for Parc-Extension.
Is radon a problem in Parc-Extension?
Around Parc-Extension, 74 survey homes were tested and 6.8% came in over 200 Bq/m³, a guide to the area, not to any one home.
How is Parc-Extension’s Hazard risk Grade worked out?
Hazard risk gives Parc-Extension C, weighing earthquakes and radon and counting wildfire only against it.
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).