Photo: Gilles Douaire · CC BY-SA 2.0Saint-Édouard is on Canada’s flood inventory: 1 listed, led by MRC Roussillon
Wildfire barely registers for Saint-Édouard, at 0% of the land within 25 km since 1986 (0.001% a year). Seismic risk runs high: $0.20 of expected damage per $1,000 of buildings a year, the typical town $0.030. Radon is about average around Saint-Édouard: 8.2% of tested homes in the survey area topped the guideline, against 6.6% for the typical town. Hazard risk gives Saint-Édouard a grade of C−, from earthquakes and radon alone.
What stands out about Saint-Édouard’s hazards
For Saint-Édouard, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Saint-Édouard faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Saint-Édouard grades C− for hazard risk
The grade weighs Saint-Édouard’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: Earthquake losses are a model’s expectation over many years, not a forecast for any one. The burned-area record misses fires under about 10 ha and most grass and farm fires.
Wildfire is rare near Saint-Édouard: 0% of the land within 25 km burned since 1986, 0% within 5 km
Fires mapped since 1986 around where Saint-Édouard’s residents live, and the fuel next to their homes.
Low: the land around Saint-Édouard burns at 0.001% a year, where the typical Canadian town sees 0.000%.
Saint-Édouard’s homes have had no fire within 5 km since 1986; the closest was 17 km away.
Forest makes up 0.1% of the land within 5 km of Saint-Édouard and 3.6% within 25 km, little for a forest fire to run through.
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
At 0.001% a year, Saint-Édouard ranks 136th of the 514 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.
The low band takes in 92% of Canada’s 2,610 towns, Saint-Édouard among them, though its rate is above zero; 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.
A flood study covers Saint-Édouard, from MRC Roussillon: 1 on the inventory
Flood studies whose area touches Saint-Édouard, from NRCan’s inventory, each linked to its owner.
The flood study touching Saint-Édouard is MRC Roussillon’s, dated 2000; its own map shows the zones street by street.
| Study | By | Year | Status |
|---|---|---|---|
| Roussillon-Tortue | MRC Roussillon | 2000 | final |
Towns with a flood study on file
Mapping in Quebec reaches 45% of towns, Saint-Édouard among them, below the 58% across Canada.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
The grade leaves flood out, since a study area says nothing about how many of Saint-Édouard’s homes are at risk.
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 Saint-Édouard: $0.20 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.
The typical town loses $0.030 a year to shaking; Saint-Édouard loses $0.20, 6.7 times as much.
Shaking damage a year per $1,000 of building value
Earthquake risk in Quebec peaks in La Pocatière ($0.48); Saint-Édouard, at $0.20, 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.
More earthquake risk than most: only 11% of Canada’s 2,611 towns are above Saint-Édouard.
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).
For Saint-Édouard the model prices shaking damage to buildings, nothing more.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
8.2% of homes tested around Saint-Édouard are over the radon guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline.
8.2% of tested homes around Saint-Édouard were over the guideline, much like the typical Canadian town at 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Saint-Édouard’s area, at 8.2%, 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.
Saint-Édouard 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.
Neighbouring homes in Saint-Édouard can differ a lot; only a long-term test tells you about yours.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Radon tests: one figure for all of the Monteregie health region
Where to get warnings in Saint-Édouard
Environment and Climate Change Canada issues the weather alerts for Saint-Édouard; 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. |
For fires near Saint-Édouard, the national fire information system maps danger and active fires daily; local authorities give any evacuation order.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
How Saint-Édouard’s neighbours compare on hazards
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Saint-Édouard | Low | $0.20 | 8.2% | Yes |
| Saint-Michel 3,672 · 5.1 km | Low | $0.18 | 8.2% | None listed |
| Saint-Patrice-de-Sherrington 1,996 · 5.5 km | Low | $0.18 | 8.2% | None listed |
| Saint-Jacques-le-Mineur 1,907 · 9.3 km | Low | $0.19 | 8.2% | Yes |
| Saint-Rémi 9,557 · 9.4 km | Low | $0.18 | 8.2% | Yes |
| Saint-Cyprien-de-Napierville 1,786 · 9.7 km | Low | $0.15 | 8.2% | None listed |
| Napierville 4,187 · 9.8 km | Low | $0.18 | 8.2% | None listed |
Among its neighbours Saint-Édouard has the most fire on record (low); Saint-Michel follows (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Saint-Édouard faces
What to do about the hazards Saint-Édouard 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. About 14,000 homes were tested across Canada in 2009–2011, and the share over the guideline for Saint-Édouard is its health region’s, the survey’s design unit.
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Saint-Édouard’s census subdivision (a neighbourhood shows its city’s).
- Wildfire counts one way. For Saint-Édouard, wildfire means how much nearby land burned in the past forty years, a one-way input that can pull Risk down and nothing more.
- Flood studies aren’t flood zones. NRCan’s inventory says where flood mapping exists, not where water goes; the map’s owner is the authority for Saint-Édouard.
Questions about flooding and hazards in Saint-Édouard
How big is the earthquake risk in Saint-Édouard?
About $0.20 a year per $1,000 of building value, NRCan’s long-run expectation for Saint-Édouard.
Does Saint-Édouard flood?
There is flood mapping for Saint-Édouard on the national inventory, each study linked to its owner’s map, none of them graded.
Is radon a problem in Saint-Édouard?
Around Saint-Édouard, 110 survey homes were tested and 8.2% came in over 200 Bq/m³, a guide to the area, not to any one home.
Is Saint-Édouard at risk of wildfire?
Fire has reached 0% of the land around Saint-Édouard since 1986 (last in 2024); at low, it neither helps nor hurts the grade.
How is Saint-Édouard’s Hazard risk Grade worked out?
Saint-Édouard grades C− for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
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).