Photo: Pierre Bona · CC BY-SA 3.0A flood study covers Ange-Gardien: 2 on the national inventory, the newest from Gouvernement du Québec
Fire seldom reaches Ange-Gardien: since 1986, 0% of the land within 25 km has burned (0.000% a year). Shaking is a bigger worry than in most places, at $0.12 a year per $1,000 of building value ($0.030 typical). Radon is about average around Ange-Gardien: 8.2% of tested homes in the survey area topped the guideline, against 6.6% for the typical town. Hazard risk gives Ange-Gardien a grade of C, from earthquakes and radon alone.
What stands out about Ange-Gardien’s hazards
For Ange-Gardien, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Ange-Gardien faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Ange-Gardien: C
Earthquake risk and radon make Ange-Gardien’s grade; wildfire can only lower it, never raise it, and flood studies are listed but not scored.
Its place: #138 of 507 in Quebec and #2,082 of 2,589 Canadian towns.
How sure: Earthquake losses are a model’s expectation over many years, not a forecast for any one. The burned-area record misses fires under about 10 ha and most grass and farm fires.
Few fires near Ange-Gardien: 0% within 5 km, 0% within 25 km
Fires mapped since 1986 around where Ange-Gardien’s residents live, and the fuel next to their homes.
At 0.000% of the land a year, Ange-Gardien’s burn rate is in the low band; the typical Canadian town sees 0.000%.
Around Ange-Gardien the forest is thin or far off: 0.2% of the land within 5 km and 4.1% within 25 km is forest fuel.
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
To three decimals the burn rate around Ange-Gardien is zero, as for 144 of the 513 towns in Quebec, while Mistissini reaches 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.
Most of the country’s 2,610 towns are low-band (92%, against 7.5% above); around Ange-Gardien, burning rounds to zero.
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.
Ange-Gardien is on the flood map inventory: 2 studies, latest by Gouvernement du Québec
Flood studies whose area touches Ange-Gardien, from NRCan’s inventory, each linked to its owner.
The newest of 2 studies covering Ange-Gardien is Gouvernement du Québec’s, from 2005; open its map to see the zones.
| Study | By | Year | Status |
|---|---|---|---|
| Farnham | Gouvernement du Québec | 2005 | final |
| St-Césaire-Farnham | Gouvernement du Québec | 1991 | final |
Towns with a flood study on file
Mapping in Quebec reaches 45% of towns, Ange-Gardien among them, below the 58% across Canada.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
No single decade dominates: 2 studies for Ange-Gardien between the 1990s and the 2000s.
Study dates as the NRCan inventory lists them, one count per study touching Ange-Gardien.
Listed, not scored: a flood study proves a map exists, not that Ange-Gardien floods.
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 Ange-Gardien: $0.12 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.
Ange-Gardien’s $0.12 is about 3.8 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
About level with the typical town in Quebec: Ange-Gardien’s $0.12 against $0.14; La Pocatière reaches $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: 24% of its 2,611 towns expect more damage than Ange-Gardien.
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).
Only shaking damage to buildings in Ange-Gardien is counted; landslides, liquefaction, tsunami and fire after a quake aren’t.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
Some radon around Ange-Gardien: 8.2% of area homes over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline. · Measured across the Monteregie health region: radon tests
8.2% of tested homes around Ange-Gardien 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; Ange-Gardien’s area has 8.2%, much the same.
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: Ange-Gardien, 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.
Whatever Ange-Gardien’s area share, the reading that matters is your own home’s, over a winter.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Where to get warnings in Ange-Gardien
Alerts for 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 Ange-Gardien 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 Ange-Gardien
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Ange-Gardien | Low | $0.12 | 8.2% | Yes |
| Saint-Paul-d'Abbotsford 2,891 · 8.2 km | Low | $0.096 | 8.2% | Yes |
| Saint-Césaire 6,150 · 8.9 km | Low | $0.13 | 8.2% | Yes |
| Farnham 11,315 · 9.1 km | Low | $0.13 | 8.2% | Yes |
| Saint-Alphonse-de-Granby 3,545 · 12 km | Low | $0.10 | 8.2% | None listed |
| Sainte-Brigide-d'Iberville 1,540 · 12 km | Low | $0.15 | 8.2% | Yes |
| Rougemont 2,832 · 14 km | Low | $0.11 | 8.2% | Yes |
Saint-Paul-d'Abbotsford burns a little more than Ange-Gardien, in the same low band (low here).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Ange-Gardien faces
Practical steps for Ange-Gardien’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?
- Check the address on the flood map.
- Are flood and wildfire insured?
- Is earthquake cover included?
What this data can and can’t tell you
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Ange-Gardien’s census subdivision (a neighbourhood shows its city’s).
- Flood studies aren’t flood zones. NRCan’s inventory says where flood mapping exists, not where water goes; the map’s owner is the authority for Ange-Gardien.
- Radon is a survey. About 14,000 homes were tested across Canada in 2009–2011, and the share over the guideline for Ange-Gardien is its health region’s, the survey’s design unit.
- Wildfire counts one way. For Ange-Gardien, wildfire means how much nearby land burned in the past forty years, a one-way input that can pull Risk down and nothing more.
Questions about flooding and hazards in Ange-Gardien
How is Ange-Gardien’s Hazard risk Grade worked out?
Hazard risk gives Ange-Gardien C, weighing earthquakes and radon and counting wildfire only against it.
Is radon a problem in Ange-Gardien?
8.2% of the 110 homes Health Canada tested around Ange-Gardien topped the guideline; your own house needs its own test.
Does Ange-Gardien flood?
There is flood mapping for Ange-Gardien on the national inventory, each study linked to its owner’s map, none of them graded.
Is Ange-Gardien at risk of wildfire?
Not much by Canadian standards: Ange-Gardien’s band is low, with 0% of the land within 25 km burned since 1986 (last in 2025), so wildfire doesn’t change its grade.
How big is the earthquake risk in Ange-Gardien?
About $0.12 a year per $1,000 of building value, NRCan’s long-run expectation for Ange-Gardien.
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).