Hazards in Iberville: wildfire low, radon over the guideline in 8.2% of tested homes
Burn scars are few around Iberville, with 0.1% of the land within 25 km touched by fire since 1986 (0.002% a year). Shaking is a bigger worry than in most places, at $0.23 a year per $1,000 of building value ($0.030 typical). Iberville grades C− for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Iberville’s hazards
Four national sources, each read for Iberville: earthquakes, radon, past fires and flood studies.
What Iberville faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Iberville grades C− for hazard risk
For Iberville, Risk will be the average of earthquakes and radon, with wildfire added only if it makes the average worse.
Its place: #383 of 507 in Quebec and #2,362 of 2,589 Canadian towns.
How sure: Earthquake losses are a model’s expectation over many years, not a forecast for any one. Small fires and grass fires are largely missing from the national burned-area record.
Little of the land around Iberville has burned: 0.3% within 5 km, 0.1% within 25 km since 1986
Past fire around Iberville’s homes, from the national burned-area record, with the fuel within 5 km.
In a typical year 0.002% of the land near Iberville burns; the typical Canadian town sees 0.000%, and both are low.
Land that isn’t forest covers nearly all the ground around Iberville: forest fuel is 0.3% within 5 km and 0.6% 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
In the top quarter in Quebec: Iberville ranks 35th of 513 at 0.002% a year, with Mistissini first 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.
Some fire is mapped around Iberville, but not enough to leave the low band, where 92% of Canada’s 2,610 towns are; 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.
No flood study is listed for Iberville
What Canada’s Flood Map Inventory lists for Iberville: who studied flooding and where to see their maps.
Canada’s Flood Map Inventory lists no study whose area touches Iberville, which doesn’t mean it has never been mapped.
Towns with a flood study on file
Flood maps are thinner in Quebec, 45% of towns against 58% nationally, and Iberville has none.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Flood is shown here, never graded: a study says where a map exists, not how many of Iberville’s homes stand in a flood zone.
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 Iberville: $0.23 per $1,000 of buildings a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
Iberville’s $0.23 is about 7.6 times the typical town’s $0.030: it sits in one of Canada’s more active seismic zones.
Shaking damage a year per $1,000 of building value
Earthquake risk in Quebec peaks in La Pocatière ($0.48); Iberville, 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 Iberville.
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 Iberville’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). · Area behind the earthquake risk figures: the city of Longueuil
8.2% of homes tested around Iberville are over the radon guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline. · Area-wide: radon tests, counted over the Monteregie health region
Around Iberville, 8.2% of tested homes topped the guideline, near the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Radon around Iberville is ordinary for towns in Quebec: 8.2%, 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.
Between 5% and 10% of tests over the guideline: Iberville, and 37% of Canada’s 2,611 towns; 26% are higher.
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.
Basements, soil and how a house is sealed decide its radon, so in Iberville only a test can say.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Iberville
Environment and Climate Change Canada issues the weather alerts for Iberville; 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. |
In fire season, check CWFIS for danger and active fires around Iberville, and listen to local authorities for orders.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Iberville
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Iberville | Low | $0.23 | 8.2% | None listed |
| Maricourt 14,407 · 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 |
| Laurendeau 27,321 · 2.7 km | Low | $0.23 | 8.2% | None listed |
| Brossard 97,597 · 3.6 km | Low | $0.22 | 8.2% | Yes |
| Bienville 7,888 · 3.9 km | Low | $0.23 | 8.2% | None listed |
| Laflèche 19,706 · 4.2 km | Low | $0.23 | 8.2% | None listed |
The neighbour with the most fire is Maricourt (low), still no more than Iberville (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Iberville faces
Practical steps for Iberville’s hazards, most pressing first.
- 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. Shaking damage is modelled from the ground, the buildings and the odds of each quake, and published for whole subdivisions such as Iberville’s.
- Radon is a survey. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Iberville takes its 2007 health region’s share.
- Wildfire counts one way. The wildfire figure is the share of land within 25 km of Iberville’s homes burned each year from 1986 to 2025, past fire rather than a forecast, and it can only lower Risk.
- 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 Iberville.
Questions about flooding and hazards in Iberville
Does Iberville flood?
No study on Canada’s Flood Map Inventory covers Iberville (0), which doesn’t mean it has never been mapped, so ask the municipality.
How big is the earthquake risk in Iberville?
In NRCan’s seismic model, Iberville’s buildings lose $0.23 per $1,000 of value in an average year.
Is Iberville at risk of wildfire?
Not much by Canadian standards: Iberville’s band is low, with 0.1% of the land within 25 km burned since 1986 (last in 2024), so wildfire doesn’t change its grade.
Is radon a problem in Iberville?
8.2% of the 110 homes Health Canada tested around Iberville topped the guideline; your own house needs its own test.
How is Iberville’s Hazard risk Grade worked out?
Iberville 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).