Photo: Veillg1 · CC0Saint-Robert’s hazards at a glance: a low wildfire record and 8.2% of area homes over the radon guideline
Burn scars are few around Saint-Robert, with 0.1% of the land within 25 km touched by fire since 1986 (0.002% a year). Earthquakes add more: NRCan’s model puts building losses at $0.23 a year per $1,000 of value, against $0.030 for the typical town. Saint-Robert grades C− for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Saint-Robert’s hazards
For Saint-Robert, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Saint-Robert faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Saint-Robert grades C− for hazard risk
The grade weighs Saint-Robert’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: #383 of 507 in Quebec and #2,362 of 2,589 Canadian towns.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. The burned-area record misses fires under about 10 ha and most grass and farm fires.
Wildfire is rare near Saint-Robert: 0.1% of the land within 25 km burned since 1986, 0% within 5 km
Fires mapped since 1986 around where Saint-Robert’s residents live, and the fuel next to their homes.
Low by Canadian standards: 0.002% of the land a year around Saint-Robert, 0.000% for the typical Canadian town.
No fire has burned within 5 km of Saint-Robert’s homes since 1986; the nearest burn is 9.5 km away.
Forest makes up 0.3% of the land within 5 km of Saint-Robert and 0.8% 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 513
Saint-Robert ranks 35th of the 513 towns in Quebec for burn rate, at 0.002% a year; Mistissini leads with 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.
7.5% of Canada’s 2,610 towns burn fast enough to rank moderate or above; Saint-Robert stays low, with 92%.
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 Saint-Robert
Flood studies whose area touches Saint-Robert, from NRCan’s inventory, each linked to its owner.
Nationally, Saint-Robert 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 Saint-Robert.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Flood mapping is shown for Saint-Robert to be opened and checked, never turned into a grade.
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 Saint-Robert $0.23 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.
At $0.23 per $1,000, Saint-Robert carries roughly 7.6 times the typical Canadian town’s earthquake risk ($0.030).
For earthquake risk, the only official count covers all of the city of Longueuil, Saint-Robert included.
Shaking damage a year per $1,000 of building value
Earthquake risk in Quebec peaks in La Pocatière ($0.48); Saint-Robert, at $0.23, 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 6.4% of Canada’s 2,611 towns expect more shaking damage than Saint-Robert.
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).
Only shaking damage to buildings in Saint-Robert is counted; landslides, liquefaction, tsunami and fire after a quake aren’t.
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 Saint-Robert: 8.2% over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline.
At 8.2% over the guideline, the area around Saint-Robert is about level with the typical Canadian town’s 6.6%. Saint-Robert shares its radon tests numbers with the rest of the Monteregie health region.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Saint-Robert’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.
A middling share of high tests puts Saint-Robert with 37% of Canada’s 2,611 towns, below 26% of them.
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-Robert 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).
Where to get warnings in Saint-Robert
Alerts for Saint-Robert 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 Saint-Robert 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 Saint-Robert
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Saint-Robert | Low | $0.23 | 8.2% | None listed |
| Roberval 2,536 · 1.5 km | Low | $0.23 | 8.2% | None listed |
| Laflèche 19,706 · 1.5 km | Low | $0.23 | 8.2% | None listed |
| Saint-Jean-Vianney 13,181 · 1.7 km | Low | $0.23 | 8.2% | None listed |
| Saint-Vincent-de-Paul 8,352 · 2.0 km | Low | $0.23 | 8.2% | None listed |
| Sacré-Coeur 20,375 · 2.0 km | Low | $0.23 | 8.2% | None listed |
| Nouveau Greenfield Park 6,199 · 2.4 km | Low | $0.23 | 8.2% | None listed |
The neighbour with the most fire is Roberval (low), still no more than Saint-Robert (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Saint-Robert faces
What to do about the hazards Saint-Robert 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. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Saint-Robert’s census subdivision (a neighbourhood shows its city’s).
- Wildfire counts one way. For Saint-Robert, wildfire means how much nearby land burned in the past forty years, a one-way input that can pull Risk down and nothing more.
- 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 Saint-Robert until then.
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Saint-Robert without grading them.
Questions about flooding and hazards in Saint-Robert
Does Saint-Robert flood?
Nothing is listed for Saint-Robert on the national inventory (0); local maps may still exist with the municipality.
Is Saint-Robert at risk of wildfire?
Less than most of Canada: 0.1% of the land within 25 km of Saint-Robert has burned since 1986, the last in 2024, a low band that leaves Risk alone.
Is radon a problem in Saint-Robert?
In Health Canada’s survey, 8.2% of 110 homes tested in Saint-Robert’s area were above 200 Bq/m³, though only a test tells you about one house.
How big is the earthquake risk in Saint-Robert?
Expected earthquake damage in Saint-Robert comes to $0.23 a year for each $1,000 that buildings are worth.
How is Saint-Robert’s Hazard risk Grade worked out?
Hazard risk gives Saint-Robert 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).