Photo: P199 · CC BY-SA 3.0Flood mapping exists for Terrasse-Vaudreuil: 2 on record, latest by Communauté métropolitaine de Montréal
Since 1986 almost nothing has burned near Terrasse-Vaudreuil: 0% of the land within 25 km, or 0.001% a year. Earthquakes add more: NRCan’s model puts building losses at $0.19 a year per $1,000 of value, against $0.030 for the typical town. Radon around Terrasse-Vaudreuil is ordinary for Canada: 8.2% of tested homes over the guideline (6.6% typical). Terrasse-Vaudreuil grades C− for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Terrasse-Vaudreuil’s hazards
Four national sources, each read for Terrasse-Vaudreuil: earthquakes, radon, past fires and flood studies.
What Terrasse-Vaudreuil faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Terrasse-Vaudreuil grades C− for hazard risk
For Terrasse-Vaudreuil, Risk will be the average of earthquakes and radon, with wildfire added only if it makes the average worse.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. Small fires and grass fires are largely missing from the national burned-area record.
Few fires near Terrasse-Vaudreuil: 0% within 5 km, 0% within 25 km
Fires mapped since 1986 around where Terrasse-Vaudreuil’s residents live, and the fuel next to their homes.
Around Terrasse-Vaudreuil fire takes 0.001% of the land in a typical year, the typical Canadian town 0.000%, which is low.
Fire has stayed at least 12 km from Terrasse-Vaudreuil’s homes since 1986.
Forest fuel is scarce around Terrasse-Vaudreuil: 1.5% of the land within 5 km, 2.6% 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 514
In the upper half in Quebec but far from Mistissini (0.31%): Terrasse-Vaudreuil ranks 136th of 514, at 0.001% 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.
Low, like 92% of the country’s 2,610 towns: the land around Terrasse-Vaudreuil burns, but slower than in the 7.5% 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.
Flooding around Terrasse-Vaudreuil is mapped in 2 studies, the newest by Communauté métropolitaine de Montréal
Flood studies whose area touches Terrasse-Vaudreuil, from NRCan’s inventory, each linked to its owner.
The newest of 2 studies covering Terrasse-Vaudreuil is Communauté métropolitaine de Montréal’s, from 2008; open its map to see the zones.
| Study | By | Year | Status |
|---|---|---|---|
| Montréal-Argenteuil-Deux-Montagnes-Vaudreuil-Soulanges | Communauté métropolitaine de Montréal | 2008 | final |
| St-Louis-Varennes | Gouvernement du Québec | 1977 | final |
Towns with a flood study on file
Flood maps are thinner in Quebec, 45% of towns against 58% nationally, but Terrasse-Vaudreuil has one.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
The 2 studies touching Terrasse-Vaudreuil are spread over time, from the 1970s to the 2000s.
Study dates as the NRCan inventory lists them, one count per study touching Terrasse-Vaudreuil.
Flood studies don’t enter the grade; they are listed so you can open the official map for Terrasse-Vaudreuil.
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 Terrasse-Vaudreuil $0.19 per $1,000 a year
NRCan’s seismic risk model: the damage shaking is expected to do to buildings each year, on average over many years.
Roughly 6.2 times the typical $0.030: Terrasse-Vaudreuil’s $0.19 marks real seismic exposure.
Shaking damage a year per $1,000 of building value
Terrasse-Vaudreuil’s $0.19 tops the median in Quebec, $0.14, though 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.
Terrasse-Vaudreuil sits above most of Canada’s 2,611 towns on earthquake risk; 13% 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).
Roads, pipes and bridges aren’t in Terrasse-Vaudreuil’s figure, nor landslides or tsunami: it is buildings and shaking.
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 Terrasse-Vaudreuil: 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.
At 8.2% over the guideline, the area around Terrasse-Vaudreuil is about level with the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Around Terrasse-Vaudreuil, 8.2% of tests topped the guideline, about the same as the typical town in Quebec (8.2%).
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: Terrasse-Vaudreuil, 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.
The share describes the area, not a house: in Terrasse-Vaudreuil as anywhere, test to be sure.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Radon tests published for the Monteregie health region, not by town
Weather and fire alerts for Terrasse-Vaudreuil
Alerts for Terrasse-Vaudreuil 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. |
Fire danger and active fires near Terrasse-Vaudreuil are mapped daily by the Canadian Wildland Fire Information System; evacuation orders come from the municipality or province.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Terrasse-Vaudreuil
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Terrasse-Vaudreuil | Low | $0.19 | 8.2% | Yes |
| Pincourt 15,220 · 1.9 km | Low | $0.17 | 8.2% | Yes |
| L'Île-Perrot 11,921 · 2.6 km | Low | $0.16 | 8.2% | Yes |
| Senneville 1,042 · 3.8 km | Low | $0.15 | 6.8% | Yes |
| Sainte-Anne-de-Bellevue 5,393 · 4.0 km | Low | $0.17 | 6.8% | Yes |
| Vaudreuil-Dorion 46,413 · 4.0 km | Low | $0.17 | 8.2% | Yes |
| Vaudreuil-sur-le-Lac 1,340 · 4.7 km | Low | $0.17 | 8.2% | Yes |
Pincourt (low) has the heaviest fire record of Terrasse-Vaudreuil’s neighbours, and Terrasse-Vaudreuil (low) matches or beats it.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Terrasse-Vaudreuil faces
Practical steps for Terrasse-Vaudreuil’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
- Wildfire counts one way. Wildfire is read from the national burned-area record around Terrasse-Vaudreuil’s homes since 1986, a history of fire that may lower Risk but never raises it.
- Earthquakes are modelled. NRCan models what earthquakes would cost buildings each year on average, subdivision by subdivision; Terrasse-Vaudreuil’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 Terrasse-Vaudreuil sits in.
- 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 Terrasse-Vaudreuil floods.
Questions about flooding and hazards in Terrasse-Vaudreuil
Is Terrasse-Vaudreuil at risk of wildfire?
Some, but Terrasse-Vaudreuil’s low band (0% of nearby land burned since 1986, latest 2025) is short of the level that counts.
How big is the earthquake risk in Terrasse-Vaudreuil?
Expected earthquake damage in Terrasse-Vaudreuil comes to $0.19 a year for each $1,000 that buildings are worth.
Does Terrasse-Vaudreuil flood?
Terrasse-Vaudreuil’s area has been studied for flooding, and the owner’s map shows which streets lie in a zone; the grade leaves flood out.
Is radon a problem in Terrasse-Vaudreuil?
The area’s survey found 8.2% of 110 tested homes above Health Canada’s guideline, so a three-month test is worth doing in Terrasse-Vaudreuil.
How is Terrasse-Vaudreuil’s Hazard risk Grade worked out?
Terrasse-Vaudreuil grades C− for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
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).