Photo: Gilles Douaire · CC BY-SA 2.0Hazards in Saint-Liguori: wildfire low, radon over the guideline in 3.9% of tested homes
Wildfire is rare near Saint-Liguori: 0.1% of the land within 25 km has burned since 1986, a burn rate of 0.001% a year. Earthquakes add more: NRCan’s model puts building losses at $0.16 a year per $1,000 of value, against $0.030 for the typical town. Saint-Liguori grades B− for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Saint-Liguori’s hazards
For Saint-Liguori, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Saint-Liguori faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Saint-Liguori grades B− for hazard risk
The grade weighs Saint-Liguori’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: The seismic figure is a long-run average from NRCan’s model, not a prediction. Only 77 homes were tested in the survey area, so the radon share is rough. The burned-area record misses fires under about 10 ha and most grass and farm fires.
Few fires near Saint-Liguori: 0% within 5 km, 0.1% within 25 km
Past fire around Saint-Liguori’s homes, from the national burned-area record, with the fuel within 5 km.
Forty years of fire maps put Saint-Liguori at 0.001% a year, low next to the typical Canadian town’s 0.000%.
The 5 km ring around Saint-Liguori’s homes is clear of burns since 1986, the nearest 7.2 km out.
Forest fuel rises from 4.2% within 5 km of Saint-Liguori to 15% within 25 km: the fuel lies away from homes.
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
In the upper half in Quebec but far from Mistissini (0.31%): Saint-Liguori ranks 136th of 514, at 0.001% a year.
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.
Low, like 92% of the country’s 2,610 towns: the land around Saint-Liguori burns, but slower than in the 7.5% above it.
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-Liguori
What Canada’s Flood Map Inventory lists for Saint-Liguori: who studied flooding and where to see their maps.
There is no study for Saint-Liguori on the national flood inventory, which is far from complete.
Towns with a flood study on file
Flood maps are thinner in Quebec, 45% of towns against 58% nationally, and Saint-Liguori has none.
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-Liguori’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.”
Shaking is Saint-Liguori’s costliest hazard: $0.16 a year per $1,000
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
The typical town loses $0.030 a year to shaking; Saint-Liguori loses $0.16, 5.3 times as much.
Shaking damage a year per $1,000 of building value
Shaking damage around Saint-Liguori runs at $0.16 a year, near the $0.14 of the typical town in Quebec; La Pocatière has $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.
15% of Canada’s 2,611 towns expect more shaking damage than Saint-Liguori, which places it in the upper third.
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).
What a quake does after the shaking, fire, landslides, tsunami, falls outside NRCan’s figure for Saint-Liguori.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
3.9% of homes tested around Saint-Liguori are over the radon guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline. · Radon tests for the Lanaudiere health region
A lower share than most: 3.9% of tested homes around Saint-Liguori, the typical Canadian town 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
The median in Quebec is 8.2% over 200 Bq/m³; around Saint-Liguori it is 3.9%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Radon rarely tops the guideline around Saint-Liguori, as for 37% of Canada’s 2,611 towns; 63% see 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.
Radon varies from house to house in Saint-Liguori, so the survey is a reason to test, not a result for yours.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Where to get warnings in Saint-Liguori
Environment and Climate Change Canada issues the weather alerts for Saint-Liguori; 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-Liguori, 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)
Hazards in the places around Saint-Liguori
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Saint-Liguori | Low | $0.16 | 3.9% | None listed |
| Saint-Jacques 4,830 · 5.0 km | Low | $0.16 | 3.9% | None listed |
| Crabtree 4,237 · 7.4 km | Low | $0.16 | 3.9% | Yes |
| Saint-Alexis 1,462 · 8.4 km | Low | $0.17 | 3.9% | None listed |
| Saint-Charles-Borromée 16,904 · 9.0 km | Low | $0.16 | 3.9% | Yes |
| Saint-Ambroise-de-Kildare 4,615 · 9.3 km | Low | $0.12 | 3.9% | Yes |
| Joliette 22,408 · 9.4 km | Low | $0.17 | 3.9% | Yes |
None of the places around has more fire nearby than Saint-Liguori (low); Saint-Jacques comes closest (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Saint-Liguori faces
What to do about the hazards Saint-Liguori 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. A study’s area can be a whole watershed or province, so being on the inventory says a map exists, not that a home in Saint-Liguori floods.
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Saint-Liguori’s census subdivision (a neighbourhood shows its city’s).
- Wildfire counts one way. For Saint-Liguori, 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. The radon share comes from about 14,000 long-term home tests in 2009–2011, pooled for now by the 2007 health region Saint-Liguori sits in.
Questions about flooding and hazards in Saint-Liguori
How big is the earthquake risk in Saint-Liguori?
In NRCan’s seismic model, Saint-Liguori’s buildings lose $0.16 per $1,000 of value in an average year.
Is radon a problem in Saint-Liguori?
Around Saint-Liguori, 77 survey homes were tested and 3.9% came in over 200 Bq/m³, a guide to the area, not to any one home.
How is Saint-Liguori’s Hazard risk Grade worked out?
Hazard risk gives Saint-Liguori B−, weighing earthquakes and radon and counting wildfire only against it.
Does Saint-Liguori flood?
With 0 studies on the inventory, Saint-Liguori’s flood risk is unmapped nationally; check with the municipality before buying.
Is Saint-Liguori at risk of wildfire?
Fire has reached 0.1% of the land around Saint-Liguori since 1986 (last in 2025); at low, it neither helps nor hurts 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).