Photo: Nicogag · Public domainL'Isle-Verte faces more hazards than 93% of Canadian towns
Burn scars are few around L'Isle-Verte, with 0.2% of the land within 25 km touched by fire since 1986 (0.005% a year). Earthquakes add more: NRCan’s model puts building losses at $0.15 a year per $1,000 of value, against $0.030 for the typical town. In Health Canada’s survey, 14% of homes tested in the area exceeded 200 Bq/m³ (6.6% typical). Hazard risk gives L'Isle-Verte a grade of D, from earthquakes and radon alone.
What stands out about L'Isle-Verte’s hazards
Four national sources, each read for L'Isle-Verte: earthquakes, radon, past fires and flood studies.
What L'Isle-Verte faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in L'Isle-Verte: D
For L'Isle-Verte, Risk will be the average of earthquakes and radon, with wildfire added only if it makes the average worse.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. Small fires and grass fires are largely missing from the national burned-area record.
Few fires near L'Isle-Verte: 0% within 5 km, 0.2% within 25 km
Past fire around L'Isle-Verte’s homes, from the national burned-area record, with the fuel within 5 km.
Next to the typical Canadian town (0.000% a year), L'Isle-Verte’s 0.005% is in the low band.
Since 1986 the nearest fire to L'Isle-Verte’s homes came within 18 km, never inside 5 km.
There is forest near L'Isle-Verte’s homes (21% within 5 km) and more of it further out (45% 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 514
The land around L'Isle-Verte burns at 0.005% a year, the 28th highest rate of 514 towns in Quebec; Mistissini tops it 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 L'Isle-Verte, 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.
The flood map inventory lists nothing for L'Isle-Verte
What Canada’s Flood Map Inventory lists for L'Isle-Verte: who studied flooding and where to see their maps.
The inventory has nothing for L'Isle-Verte, but a local or conservation-authority map may still exist.
Towns with a flood study on file
Only 45% of towns in Quebec have a flood study, short of Canada’s 58%, and L'Isle-Verte is not among them.
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 L'Isle-Verte 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.”
Shaking is L'Isle-Verte’s costliest hazard: $0.15 a year per $1,000
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
L'Isle-Verte’s $0.15 is about 4.9 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
L'Isle-Verte’s $0.15 is close to the median in Quebec, $0.14; La Pocatière is 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.
In the upper part of Canada’s range: 20% of its 2,611 towns expect more damage than L'Isle-Verte.
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).
Roads, pipes and bridges aren’t in L'Isle-Verte’s figure, nor landslides or tsunami: it is buildings and shaking.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
14% of homes tested around L'Isle-Verte are over the radon guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
L'Isle-Verte’s area, at 14%, is above the 6.6% of the typical Canadian town, so testing is worth more here than most places.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Radon runs higher around L'Isle-Verte than in most towns in Quebec: 14% over the guideline (8.2% is typical), 1.8% over 600.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
One test in ten or more tops the guideline around L'Isle-Verte, as in 22% of Canada’s 2,611 towns; 4.6% go 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 L'Isle-Verte only a test can say.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Not measured by town: radon tests (the Bas-Saint-Laurent health region)
Weather and fire alerts for L'Isle-Verte
Alerts for L'Isle-Verte 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 L'Isle-Verte 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)
How L'Isle-Verte’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 |
|---|---|---|---|---|
| L'Isle-Verte | Low | $0.15 | 14% | None listed |
| Saint-Arsène 1,269 · 12 km | Low | $0.19 | 14% | None listed |
| Notre-Dame-des-Neiges 1,146 · 14 km | Low | $0.10 | 14% | None listed |
| Trois-Pistoles 3,123 · 17 km | Low | $0.087 | 14% | None listed |
| Cacouna 1,888 · 17 km | Low | $0.21 | 14% | None listed |
The fire record around Cacouna is a touch heavier than L'Isle-Verte’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 L'Isle-Verte faces
Practical steps for L'Isle-Verte’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
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for L'Isle-Verte without grading them.
- 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 L'Isle-Verte until then.
- Wildfire counts one way. The wildfire figure is the share of land within 25 km of L'Isle-Verte’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 L'Isle-Verte’s.
Questions about flooding and hazards in L'Isle-Verte
Is L'Isle-Verte at risk of wildfire?
Not much by Canadian standards: L'Isle-Verte’s band is low, with 0.2% of the land within 25 km burned since 1986 (last in 2014), so wildfire doesn’t change its grade.
Is radon a problem in L'Isle-Verte?
14% of the 171 homes Health Canada tested around L'Isle-Verte topped the guideline; your own house needs its own test.
How is L'Isle-Verte’s Hazard risk Grade worked out?
Hazard risk gives L'Isle-Verte D, weighing earthquakes and radon and counting wildfire only against it.
Does L'Isle-Verte flood?
No study on Canada’s Flood Map Inventory covers L'Isle-Verte (0), which doesn’t mean it has never been mapped, so ask the municipality.
How big is the earthquake risk in L'Isle-Verte?
In NRCan’s seismic model, L'Isle-Verte’s buildings lose $0.15 per $1,000 of value in an average year.
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).