Photo: Wilfredor · CC0A flood study covers Saint-Sacrement: 1 on the national inventory, the newest from Gouvernement du Québec
Around Saint-Sacrement, wildfire is practically absent from the record: 0% within 25 km since 1986, 0.000% a year. Shaking is a bigger worry than in most places, at $0.14 a year per $1,000 of building value ($0.030 typical). Radon is about average around Saint-Sacrement: 8.8% of tested homes in the survey area topped the guideline, against 6.6% for the typical town. Hazard risk gives Saint-Sacrement a grade of C−, from earthquakes and radon alone.
What stands out about Saint-Sacrement’s hazards
Four national sources, each read for Saint-Sacrement: earthquakes, radon, past fires and flood studies.
What Saint-Sacrement faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Saint-Sacrement grades C− for hazard risk
Two inputs always count for Saint-Sacrement, earthquakes and radon; the third, wildfire, counts only against a town.
Its place: #294 of 507 in Quebec and #2,256 of 2,589 Canadian towns.
How sure: Earthquake losses are a model’s expectation over many years, not a forecast for any one. Small fires and grass fires are largely missing from the national burned-area record.
Wildfire is rare near Saint-Sacrement: 0% of the land within 25 km burned since 1986, 0% within 5 km
Past fire around Saint-Sacrement’s homes, from the national burned-area record, with the fuel within 5 km.
A burn rate of 0.000% a year keeps Saint-Sacrement in the low band (the typical Canadian town: 0.000%).
Saint-Sacrement’s homes have had no fire within 5 km since 1986; the closest was 19 km away.
21% of the land within 25 km of Saint-Sacrement is forest fuel, yet only 0.3% within 5 km of its 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 513
Of the 513 towns in Quebec, 144 have a burn rate that rounds to zero, Saint-Sacrement 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.
Saint-Sacrement shares the low band with 92% of Canada’s 2,610 towns, its burn rate rounding to nothing; 7.5% burn faster.
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.
A flood study covers Saint-Sacrement, from Gouvernement du Québec: 1 on the inventory
What Canada’s Flood Map Inventory lists for Saint-Sacrement: who studied flooding and where to see their maps.
Gouvernement du Québec studied flooding in an area that includes Saint-Sacrement (1991); open its map to see which streets lie in a flood zone.
| Study | By | Year | Status |
|---|---|---|---|
| CUQ | Gouvernement du Québec | 1991 | final |
Towns with a flood study on file
Its flood study sets Saint-Sacrement apart in Quebec, where 45% of towns have one (Canada: 58%).
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Listed, not scored: a flood study proves a map exists, not that Saint-Sacrement 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.
Earthquakes cost buildings in Saint-Sacrement $0.14 per $1,000 a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
At $0.14 per $1,000, Saint-Sacrement carries roughly 4.6 times the typical Canadian town’s earthquake risk ($0.030).
Shaking damage a year per $1,000 of building value
About level with the typical town in Quebec: Saint-Sacrement’s $0.14 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.
Saint-Sacrement sits above most of Canada’s 2,611 towns on earthquake risk; 20% are higher.
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 model counts damage to Saint-Sacrement’s buildings and their occupants from shaking only: not liquefaction, landslides, tsunami or fires after a quake.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean). · Not measured by town: earthquake risk (the city of Québec)
Radon about average around Saint-Sacrement: 8.8% over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline. · Source area for radon tests: the Capitale-Nationale health region
The survey area of Saint-Sacrement reads 8.8%, a shade from the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
2.5% of tests around Saint-Sacrement passed 600 Bq/m³; over 200, its 8.8% matches the median in Quebec, 8.2%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Saint-Sacrement is in the 5–10% band with 37% of Canada’s 2,611 towns; 26% have 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.
One home in Saint-Sacrement can be high while next door is low; a three-month test settles it.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Saint-Sacrement
Alerts for Saint-Sacrement 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 Saint-Sacrement 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)
Hazards in the places around Saint-Sacrement
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Saint-Sacrement | Low | $0.14 | 8.8% | Yes |
| Montcalm 13,572 · 1.6 km | Low | $0.14 | 8.8% | None listed |
| Saint-Sauveur 16,104 · 1.7 km | Low | $0.14 | 8.8% | Yes |
| Sillery 13,950 · 2.1 km | Low | $0.14 | 8.8% | None listed |
| Vanier 13,494 · 2.6 km | Low | $0.14 | 8.8% | Yes |
| Saint-Jean-Baptiste 8,882 · 2.7 km | Low | $0.14 | 8.8% | None listed |
| Saint-Roch 8,381 · 2.7 km | Low | $0.14 | 8.8% | None listed |
None of the places around has more fire nearby than Saint-Sacrement (low); Montcalm comes closest (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Saint-Sacrement faces
What to do about the hazards Saint-Sacrement 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?
- 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
- Flood studies aren’t flood zones. The flood inventory points to maps; it is incomplete and not the official source, so ask the municipality about any street in Saint-Sacrement.
- 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-Sacrement’s.
- Radon is a survey. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Saint-Sacrement takes its 2007 health region’s share.
- Wildfire counts one way. The wildfire figure is the share of land within 25 km of Saint-Sacrement’s homes burned each year from 1986 to 2025, past fire rather than a forecast, and it can only lower Risk.
Questions about flooding and hazards in Saint-Sacrement
How big is the earthquake risk in Saint-Sacrement?
In NRCan’s seismic model, Saint-Sacrement’s buildings lose $0.14 per $1,000 of value in an average year.
Is radon a problem in Saint-Sacrement?
In Health Canada’s survey, 8.8% of 160 homes tested in Saint-Sacrement’s area were above 200 Bq/m³, though only a test tells you about one house.
How is Saint-Sacrement’s Hazard risk Grade worked out?
Saint-Sacrement grades C− for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
Does Saint-Sacrement flood?
The inventory lists a study touching Saint-Sacrement; whether a given street floods is on that map, not in the grade.
Is Saint-Sacrement at risk of wildfire?
Less than most of Canada: 0% of the land within 25 km of Saint-Sacrement has burned since 1986, the last in 2022, a low band that leaves Risk alone.
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).