Photo: Roncanada · CC BY 4.0L'Ange-Gardien is on Canada’s flood inventory: 1 listed, led by Municipalité de Pontiac
Little of the land around L'Ange-Gardien has burned: 0% within 25 km since 1986, or 0.001% a year. Earthquakes add more: NRCan’s model puts building losses at $0.095 a year per $1,000 of value, against $0.030 for the typical town. More homes than usual carry radon here, 13% over the guideline where the typical town has 6.6%. L'Ange-Gardien grades C− for hazard risk; wildfire is low here, so it earns no credit.
What stands out about L'Ange-Gardien’s hazards
Four national sources, each read for L'Ange-Gardien: earthquakes, radon, past fires and flood studies.
What L'Ange-Gardien faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
L'Ange-Gardien grades C− for hazard risk
The grade weighs L'Ange-Gardien’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: #425 of 507 in Quebec and #2,416 of 2,589 Canadian towns.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. The radon share rests on 63 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 L'Ange-Gardien: 0% of the land within 25 km burned since 1986, 0% within 5 km
Past fire around L'Ange-Gardien’s homes, from the national burned-area record, with the fuel within 5 km.
At 0.001% of the land a year, L'Ange-Gardien’s burn rate is in the low band; the typical Canadian town sees 0.000%.
11% of the land within 5 km of L'Ange-Gardien is forest fuel, close to the 13% 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
At 0.001% a year, L'Ange-Gardien ranks 136th of the 513 towns in Quebec; Mistissini leads 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.
The low band takes in 92% of Canada’s 2,610 towns, L'Ange-Gardien among them, though its rate is above zero; 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.
L'Ange-Gardien is on the flood map inventory: 1 study, by Municipalité de Pontiac
What Canada’s Flood Map Inventory lists for L'Ange-Gardien: who studied flooding and where to see their maps.
For L'Ange-Gardien the inventory points to Municipalité de Pontiac’s 2016 study, whose map is the one to check.
| Study | By | Year | Status |
|---|---|---|---|
| Gatineau-Argenteuil-Collindes-de-l'Outaouais | Municipalité de Pontiac | 2016 | final |
Towns with a flood study on file
Flood maps are thinner in Quebec, 45% of towns against 58% nationally, but L'Ange-Gardien has one.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Flood studies don’t enter the grade; they are listed so you can open the official map for L'Ange-Gardien.
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.”
Natural Resources Canada, Canada Flood Map Inventory; links go to each study’s owner.
High seismic risk in L'Ange-Gardien: $0.095 per $1,000 of buildings a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
At $0.095 per $1,000, L'Ange-Gardien carries roughly 3.2 times the typical Canadian town’s earthquake risk ($0.030).
Shaking damage a year per $1,000 of building value
Earthquake risk in Quebec peaks in La Pocatière ($0.48); L'Ange-Gardien, at $0.095, is below 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.
26% of Canada’s 2,611 towns expect more shaking damage than L'Ange-Gardien, 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).
The loss is to L'Ange-Gardien’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).
Test for radon in L'Ange-Gardien: 13% of area homes were over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
Radon runs above the typical Canadian town (6.6%) in L'Ange-Gardien’s area, at 13%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
L'Ange-Gardien’s area, at 13%, is above the median in Quebec (8.2%), and 4.8% of its tests passed 600 Bq/m³.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
L'Ange-Gardien is in the 10–20% band, with 22% of Canada’s 2,611 towns; only 4.6% 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 L'Ange-Gardien only a test can say.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Radon tests: one figure for all of the Outaouais health region
Weather and fire alerts for L'Ange-Gardien
Alerts for L'Ange-Gardien 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 L'Ange-Gardien to phones; CWFIS shows the day’s fire danger.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
How L'Ange-Gardien’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'Ange-Gardien | Low | $0.095 | 13% | Yes |
| Vallée-de-la-Lièvre 15,388 · 6.1 km | Low | $0.12 | 13% | Yes |
| Lochaber-Partie-Ouest 1,016 · 6.7 km | Low | $0.10 | 13% | Yes |
| Bassin-de-la-Lièvre 10,571 · 11 km | Low | $0.12 | 13% | Yes |
| Cumberland 6,139 · 13 km | Low | $0.15 | 6.2% | Yes |
| Thurso 3,439 · 13 km | Low | $0.12 | 13% | None listed |
| Cardinal Creek 11,676 · 17 km | Low | $0.15 | 6.2% | Yes |
Vallée-de-la-Lièvre (low) has the heaviest fire record of L'Ange-Gardien’s neighbours, and L'Ange-Gardien (low) matches or beats it.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what L'Ange-Gardien faces
What to do about the hazards L'Ange-Gardien 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.
- Clear needles and wood nearby.
- Keep a grab-and-go bag ready.
- In smoke, stay in; filter air.
- Has it had a radon test?
- Check the address on the flood map.
- Are flood and wildfire insured?
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 L'Ange-Gardien floods.
- Earthquakes are modelled. NRCan models what earthquakes would cost buildings each year on average, subdivision by subdivision; L'Ange-Gardien’s figure is its subdivision’s.
- 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 L'Ange-Gardien sits in.
- Wildfire counts one way. Wildfire is read from the national burned-area record around L'Ange-Gardien’s homes since 1986, a history of fire that may lower Risk but never raises it.
Questions about flooding and hazards in L'Ange-Gardien
Is L'Ange-Gardien at risk of wildfire?
Less than most of Canada: 0% of the land within 25 km of L'Ange-Gardien has burned since 1986, the last in 2025, a low band that leaves Risk alone.
Is radon a problem in L'Ange-Gardien?
In Health Canada’s survey, 13% of 63 homes tested in L'Ange-Gardien’s area were above 200 Bq/m³, though only a test tells you about one house.
How big is the earthquake risk in L'Ange-Gardien?
NRCan’s model expects shaking to cost buildings in L'Ange-Gardien $0.095 a year for every $1,000 of their value, on average over many years.
How is L'Ange-Gardien’s Hazard risk Grade worked out?
L'Ange-Gardien’s Hazard risk grade is C−, built on earthquakes and radon with a one-sided wildfire input.
Does L'Ange-Gardien flood?
L'Ange-Gardien’s area has been studied for flooding, and the owner’s map shows which streets lie in a zone; the grade leaves flood out.
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).