Photo: Cantons-de-l'Est · CC BY-SA 4.0Saint-Cyprien-de-Napierville’s hazards at a glance: a low wildfire record and 8.2% of area homes over the radon guideline
Fire has left almost no mark near Saint-Cyprien-de-Napierville: 0% of the land within 25 km since 1986, 0.001% a year. Seismic risk runs high: $0.15 of expected damage per $1,000 of buildings a year, the typical town $0.030. Saint-Cyprien-de-Napierville grades C for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Saint-Cyprien-de-Napierville’s hazards
For Saint-Cyprien-de-Napierville, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Saint-Cyprien-de-Napierville faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Saint-Cyprien-de-Napierville grades C for hazard risk
Risk averages earthquakes and radon; wildfire joins only where it pulls the average down, so a town like Saint-Cyprien-de-Napierville with little fire nearby would get no credit for it.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. The burned-area record misses fires under about 10 ha and most grass and farm fires.
Little of the land around Saint-Cyprien-de-Napierville has burned: 0% within 5 km, 0% within 25 km since 1986
Past fire around Saint-Cyprien-de-Napierville’s homes, from the national burned-area record, with the fuel within 5 km.
With 0.001% burned a year, Saint-Cyprien-de-Napierville is among the many low-band places (the typical Canadian town 0.000%).
The closest burn since 1986 lies 21 km from Saint-Cyprien-de-Napierville’s homes, none within 5 km.
Around Saint-Cyprien-de-Napierville the forest is thin or far off: 1.4% of the land within 5 km and 3.6% 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 514
Saint-Cyprien-de-Napierville sits mid-table in Quebec: 136th of 514 towns, at 0.001% a year, well behind Mistissini (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, Saint-Cyprien-de-Napierville 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.
The flood map inventory lists nothing for Saint-Cyprien-de-Napierville
What Canada’s Flood Map Inventory lists for Saint-Cyprien-de-Napierville: who studied flooding and where to see their maps.
Canada’s Flood Map Inventory lists no study whose area touches Saint-Cyprien-de-Napierville, which doesn’t mean it has never been mapped.
Towns with a flood study on file
Only 45% of towns in Quebec have a flood study, short of Canada’s 58%, and Saint-Cyprien-de-Napierville is not among them.
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-Cyprien-de-Napierville’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.”
Earthquakes cost buildings in Saint-Cyprien-de-Napierville $0.15 per $1,000 a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
At $0.15 per $1,000, Saint-Cyprien-de-Napierville carries roughly 5.1 times the typical Canadian town’s earthquake risk ($0.030).
Shaking damage a year per $1,000 of building value
Shaking damage around Saint-Cyprien-de-Napierville runs at $0.15 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.
Saint-Cyprien-de-Napierville sits above most of Canada’s 2,611 towns on earthquake risk; 15% 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).
What a quake does after the shaking, fire, landslides, tsunami, falls outside NRCan’s figure for Saint-Cyprien-de-Napierville.
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-Cyprien-de-Napierville: 8.2% over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
Near the middle for radon: Saint-Cyprien-de-Napierville’s area 8.2%, the typical Canadian town 6.6%. Saint-Cyprien-de-Napierville shares its radon tests numbers with the rest of the Monteregie health region.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Saint-Cyprien-de-Napierville’s area, at 8.2%, is close to 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.
A middling share of high tests puts Saint-Cyprien-de-Napierville with 37% of Canada’s 2,611 towns, below 26% of them.
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.
Neighbouring homes in Saint-Cyprien-de-Napierville can differ a lot; only a long-term test tells you about yours.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Where to get warnings in Saint-Cyprien-de-Napierville
Environment and Climate Change Canada issues the weather alerts for Saint-Cyprien-de-Napierville; 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-Cyprien-de-Napierville, 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)
How Saint-Cyprien-de-Napierville’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 |
|---|---|---|---|---|
| Saint-Cyprien-de-Napierville | Low | $0.15 | 8.2% | None listed |
| Napierville 4,187 · 3.6 km | Low | $0.18 | 8.2% | None listed |
| Saint-Patrice-de-Sherrington 1,996 · 8.3 km | Low | $0.18 | 8.2% | None listed |
| Saint-Bernard-de-Lacolle 1,655 · 9.6 km | Low | $0.17 | 8.2% | None listed |
| Saint-Édouard 1,438 · 9.7 km | Low | $0.20 | 8.2% | Yes |
| Lacolle 2,806 · 10 km | Low | $0.17 | 8.2% | Yes |
| Saint-Blaise-sur-Richelieu 2,165 · 11 km | Low | $0.18 | 8.2% | Yes |
Saint-Cyprien-de-Napierville’s low band tops its neighbours; Saint-Édouard is next (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Saint-Cyprien-de-Napierville faces
What to do about the hazards Saint-Cyprien-de-Napierville 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
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Saint-Cyprien-de-Napierville’s census subdivision (a neighbourhood shows its city’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 Saint-Cyprien-de-Napierville sits in.
- Wildfire counts one way. For Saint-Cyprien-de-Napierville, wildfire means how much nearby land burned in the past forty years, a one-way input that can pull Risk down and nothing more.
- 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-Cyprien-de-Napierville floods.
Questions about flooding and hazards in Saint-Cyprien-de-Napierville
Does Saint-Cyprien-de-Napierville flood?
Nothing is listed for Saint-Cyprien-de-Napierville on the national inventory (0); local maps may still exist with the municipality.
How big is the earthquake risk in Saint-Cyprien-de-Napierville?
In NRCan’s seismic model, Saint-Cyprien-de-Napierville’s buildings lose $0.15 per $1,000 of value in an average year.
How is Saint-Cyprien-de-Napierville’s Hazard risk Grade worked out?
Saint-Cyprien-de-Napierville’s Hazard risk grade is C, built on earthquakes and radon with a one-sided wildfire input.
Is Saint-Cyprien-de-Napierville at risk of wildfire?
Less than most of Canada: 0% of the land within 25 km of Saint-Cyprien-de-Napierville has burned since 1986, the last in 2024, a low band that leaves Risk alone.
Is radon a problem in Saint-Cyprien-de-Napierville?
In Health Canada’s survey, 8.2% of 110 homes tested in Saint-Cyprien-de-Napierville’s area were above 200 Bq/m³, though only a test tells you about one house.
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).