Photo: Richard Coté · CC BY-SA 4.0Hazards in Saint-Ludger: wildfire low, radon over the guideline in 7.3% of tested homes
The burned-area map is nearly blank around Saint-Ludger, 0% within 25 km since 1986, 0.000% a year. Shaking is about as much of a worry in Saint-Ludger as in most places, at $0.041 a year per $1,000 of building value ($0.030 typical). Hazard risk gives Saint-Ludger a grade of B, from earthquakes and radon alone.
What stands out about Saint-Ludger’s hazards
Four national sources, each read for Saint-Ludger: earthquakes, radon, past fires and flood studies.
What Saint-Ludger faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Saint-Ludger grades B for hazard risk
Seismic risk and radon set Saint-Ludger’s grade, wildfire can drag it down, and flood mapping stays out of it.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. The radon share rests on 55 home tests in the survey area, so a few homes move it. Small fires and grass fires are largely missing from the national burned-area record.
Wildfire is rare near Saint-Ludger: 0% of the land within 25 km burned since 1986, 0% within 5 km
Fires mapped since 1986 around where Saint-Ludger’s residents live, and the fuel next to their homes.
Fire claims 0.000% of the land around Saint-Ludger each year, a low band, with the typical Canadian town at 0.000%.
Within 5 km of Saint-Ludger, 51% of the land is forest fuel; widen the ring to 25 km and it is 60%.
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
Of the 514 towns in Quebec, 145 have a burn rate that rounds to zero, Saint-Ludger among them; Mistissini leads at 0.31% 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.
The low band holds 92% of Canada’s 2,610 towns, and Saint-Ludger sits at its very bottom; only 7.5% are 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-Ludger
Flood studies whose area touches Saint-Ludger, from NRCan’s inventory, each linked to its owner.
An empty entry for Saint-Ludger on the inventory isn’t proof of safety; ask locally for flood maps.
Towns with a flood study on file
Mapping in Quebec reaches 45% of towns, below the 58% across Canada, and not Saint-Ludger.
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-Ludger 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.”
Ordinary seismic risk in Saint-Ludger: $0.041 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.
Nothing unusual about Saint-Ludger’s ground: $0.041 against a typical $0.030, 1.4 times.
Shaking damage a year per $1,000 of building value
The typical town in Quebec expects $0.14 a year in shaking damage; Saint-Ludger expects less, $0.041, and La Pocatière the most, $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.
Around half of Canada’s 2,611 towns expect more shaking damage than Saint-Ludger (43%).
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 Saint-Ludger’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).
Radon about average around Saint-Ludger: 7.3% over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline.
7.3% of tested homes around Saint-Ludger were over the guideline, much like the typical Canadian town at 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
The typical town in Quebec has 8.2% over 200 Bq/m³; Saint-Ludger’s area has 7.3%, much the same.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Radon tops the guideline in a modest share of homes around Saint-Ludger, a band holding 37% of Canada’s 2,611 towns; 26% rank above.
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.
The share describes the area, not a house: in Saint-Ludger as anywhere, test to be sure.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Data for radon tests covers the Estrie health region
Weather and fire alerts for Saint-Ludger
Alerts for Saint-Ludger 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. |
Alert Ready carries evacuation orders for Saint-Ludger to phones; CWFIS shows the day’s fire danger.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Saint-Ludger
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Saint-Ludger | Low | $0.041 | 7.3% | None listed |
| Lac-Drolet 1,066 · 11 km | Low | $0.046 | 7.3% | None listed |
| Saint-Gédéon-de-Beauce 2,136 · 12 km | Low | $0.047 | 13% | None listed |
Among its neighbours Saint-Ludger has the most fire on record (low); Lac-Drolet follows (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Saint-Ludger faces
Practical steps for Saint-Ludger’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.
- Clear needles and wood nearby.
- Keep a grab-and-go bag ready.
- In smoke, stay in; filter air.
- Has it had a radon test?
- Ask the municipality for flood maps.
- Are flood and wildfire insured?
What this data can and can’t tell you
- Wildfire counts one way. The wildfire figure is the share of land within 25 km of Saint-Ludger’s homes burned each year from 1986 to 2025, past fire rather than a forecast, and it can only lower Risk.
- 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-Ludger until then.
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Saint-Ludger without grading them.
- 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 Saint-Ludger’s.
Questions about flooding and hazards in Saint-Ludger
How big is the earthquake risk in Saint-Ludger?
Expected earthquake damage in Saint-Ludger comes to $0.041 a year for each $1,000 that buildings are worth.
How is Saint-Ludger’s Hazard risk Grade worked out?
Saint-Ludger grades B for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
Is Saint-Ludger at risk of wildfire?
The burned-area record shows next to nothing around Saint-Ludger (0% within 25 km since 1986), so its band is low.
Is radon a problem in Saint-Ludger?
7.3% of the 55 homes Health Canada tested around Saint-Ludger topped the guideline; your own house needs its own test.
Does Saint-Ludger flood?
No study on Canada’s Flood Map Inventory covers Saint-Ludger (0), which doesn’t mean it has never been mapped, so ask the municipality.
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).