Photo: P199 · CC BY-SA 3.0High radon around Saint-Léonard: 29% of homes tested in the area exceed 200 Bq/m³
No wildfire is mapped within 25 km of Saint-Léonard’s homes since 1986 (0% of the land, 0.000% a year). NRCan expects $0.037 of shaking damage a year per $1,000 of buildings in Saint-Léonard, near the typical $0.030. Saint-Léonard grades D for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Saint-Léonard’s hazards
For Saint-Léonard, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Saint-Léonard faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Saint-Léonard: D
Seismic risk and radon set Saint-Léonard’s grade, wildfire can drag it down, and flood mapping stays out of 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.
Wildfire is rare near Saint-Léonard: 0% of the land within 25 km burned since 1986, 0% within 5 km
Past fire around Saint-Léonard’s homes, from the national burned-area record, with the fuel within 5 km.
Low by Canadian standards: 0.000% of the land a year around Saint-Léonard, 0.000% for the typical Canadian town.
About as much forest grows next to Saint-Léonard’s homes (51% within 5 km) as across 25 km (56%).
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 New Brunswick · highest of 61
Little or nothing burns around Saint-Léonard in a typical year; 16 of the 61 towns in New Brunswick share that, and Tracadie leads at 0.28%.
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.
Measured against 2,610 towns, Saint-Léonard is in the largest group, low (92%), and at its floor, while 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.
Service New Brunswick - GeoNB has mapped flooding for Saint-Léonard (1 study)
What Canada’s Flood Map Inventory lists for Saint-Léonard: who studied flooding and where to see their maps.
A 2020 study by Service New Brunswick - GeoNB covers Saint-Léonard, and its map, not the inventory, shows the zones.
| Study | By | Year | Status |
|---|---|---|---|
| Inland Flood Mapping in New Brunswick and Updated Sea-Level Rise and Flooding Estimates for New Brunswick Coastal Sections 2020 | Service New Brunswick - GeoNB | 2020 | final |
Towns with a flood study on file
Saint-Léonard is one of the 93% of towns in New Brunswick with a flood study on file; across Canada it is 58%.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Nothing here counts toward Risk; the studies are pointers to the maps their owners keep for Saint-Léonard.
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-Léonard $0.037 per $1,000 a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
With $0.037 of shaking damage a year per $1,000, Saint-Léonard is about even with the typical $0.030 (1.2 times).
Shaking damage a year per $1,000 of building value
Shaking damage around Saint-Léonard runs at $0.037 a year, near the $0.036 of the typical town in New Brunswick; St. Stephen has $0.16.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
Neither high nor low for Canada: 45% of the 2,611 towns expect more damage than Saint-Léonard.
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).
For Saint-Léonard the model prices shaking damage to buildings, nothing more.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
Radon runs high around Saint-Léonard: 29% of tested homes over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline. · Area-wide: radon tests, counted over the Region 4 health region
At 29% over the guideline, the area around Saint-Léonard beats the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
More homes top the guideline around Saint-Léonard (29%) than in the typical town in New Brunswick (20%); 4.7% went over 600.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Few of Canada’s 2,611 towns (3.1%) share the 20–30% band with Saint-Léonard, and 1.5% sit above it.
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.
A low area share in Saint-Léonard doesn’t clear a house, nor does a high one condemn it: test.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Where to get warnings in Saint-Léonard
Environment and Climate Change Canada issues the weather alerts for Saint-Léonard; 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-Léonard, 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-Léonard’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-Léonard | Low | $0.037 | 29% | Yes |
| Saint-André 1,987 · 14 km | Low | $0.054 | 29% | Yes |
Saint-André (low) has the heaviest fire record of Saint-Léonard’s neighbours, and Saint-Léonard (low) matches or beats it.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Saint-Léonard faces
Practical steps for Saint-Léonard’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.
- 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. Flood studies cover areas of every size, which is why the page lists them for Saint-Léonard without grading them.
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Saint-Léonard’s census subdivision (a neighbourhood shows its city’s).
- Wildfire counts one way. For Saint-Léonard, wildfire means how much nearby land burned in the past forty years, a one-way input that can pull Risk down and nothing more.
- Radon is a survey. Radon figures pool the survey’s home tests by area: postal areas once their boundaries arrive, the 2007 health region around Saint-Léonard until then.
Questions about flooding and hazards in Saint-Léonard
Is Saint-Léonard at risk of wildfire?
The burned-area record shows next to nothing around Saint-Léonard (0% within 25 km since 1986), so its band is low.
Does Saint-Léonard flood?
A flood study covers Saint-Léonard on Canada’s Flood Map Inventory; open the owner’s map to check a street, since flood isn’t graded.
Is radon a problem in Saint-Léonard?
29% of the 86 homes Health Canada tested around Saint-Léonard topped the guideline; your own house needs its own test.
How is Saint-Léonard’s Hazard risk Grade worked out?
Saint-Léonard’s Hazard risk grade is D, built on earthquakes and radon with a one-sided wildfire input.
How big is the earthquake risk in Saint-Léonard?
In NRCan’s seismic model, Saint-Léonard’s buildings lose $0.037 per $1,000 of value in an average year.
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).