Photo: Jay Woodworth from Brooklyn, NY, USA · CC BY 2.0Flood mapping exists for Saint Martins: 1 on record, latest by Service New Brunswick - GeoNB
The burned-area map is nearly blank around Saint Martins, 0% within 25 km since 1986, 0.000% a year. NRCan expects $0.023 of shaking damage a year per $1,000 of buildings in Saint Martins, near the typical $0.030. More homes than usual carry radon here, 11% over the guideline where the typical town has 6.6%. Saint Martins grades B− for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Saint Martins’s hazards
For Saint Martins, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Saint Martins faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Saint Martins grades B− for hazard risk
Seismic risk and radon set Saint Martins’ grade, wildfire can drag it down, and flood mapping stays out of it.
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.
Little of the land around Saint Martins has burned: 0% within 5 km, 0% within 25 km since 1986
Past fire around Saint Martins’ homes, from the national burned-area record, with the fuel within 5 km.
At 0.000% of the land a year, Saint Martins’ burn rate is in the low band; the typical Canadian town sees 0.000%.
82% of the land within 5 km of Saint Martins is forest fuel, close to the 82% 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 New Brunswick · highest of 61
To three decimals the burn rate around Saint Martins is zero, as for 16 of the 61 towns in New Brunswick, while Tracadie reaches 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.
Most of the country’s 2,610 towns are low-band (92%, against 7.5% above); around Saint Martins, 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.
Saint Martins is on the flood map inventory: 1 study, by Service New Brunswick - GeoNB
What Canada’s Flood Map Inventory lists for Saint Martins: who studied flooding and where to see their maps.
The flood study touching Saint Martins is Service New Brunswick - GeoNB’s, dated 2020; its own map shows the zones street by street.
| 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
Mapping in New Brunswick reaches 93% of towns, Saint Martins included, beside 58% across Canada.
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 Martins.
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.
Ordinary seismic risk in Saint Martins: $0.023 per $1,000 of buildings a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
0.8 times the typical $0.030: Saint Martins’ $0.023 is ordinary.
Shaking damage a year per $1,000 of building value
The typical town in New Brunswick expects $0.036 a year in shaking damage; Saint Martins expects less, $0.023, and St. Stephen the most, $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.
Middle of the pack: 54% of Canada’s 2,611 towns have more earthquake risk than Saint Martins.
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 Saint Martins 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).
Test for radon in Saint Martins: 11% of area homes were over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline. · Measured across the Region 2 health region: radon tests
Radon runs above the typical Canadian town (6.6%) in Saint Martins’ area, at 11%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Fewer homes top the guideline around Saint Martins (11%) than in the typical town in New Brunswick (20%), yet 1% went over 600.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
More high tests than most: Saint Martins sits in a band that only 22% of Canada’s 2,611 towns share, with 4.6% above.
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.
Radon varies from house to house in Saint Martins, so the survey is a reason to test, not a result for yours.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Where to get warnings in Saint Martins
Environment and Climate Change Canada issues the weather alerts for Saint Martins; 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. |
In fire season, check CWFIS for danger and active fires around Saint Martins, and listen to local authorities for orders.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
How Saint Martins’ neighbours compare on hazards
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
Upham burns a little more than Saint Martins, 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 Saint Martins faces
Practical steps for Saint Martins’ 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. The flood inventory points to maps; it is incomplete and not the official source, so ask the municipality about any street in Saint Martins.
- Radon is a survey. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Saint Martins takes its 2007 health region’s share.
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Saint Martins’ census subdivision (a neighbourhood shows its city’s).
- Wildfire counts one way. For Saint Martins, 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 Saint Martins
How is Saint Martins’s Hazard risk Grade worked out?
Hazard risk gives Saint Martins B−, weighing earthquakes and radon and counting wildfire only against it.
How big is the earthquake risk in Saint Martins?
In NRCan’s seismic model, Saint Martins’ buildings lose $0.023 per $1,000 of value in an average year.
Is Saint Martins at risk of wildfire?
Hardly at all on record: 0% of the land within 25 km of Saint Martins since 1986, a low band, though small grass fires aren’t mapped.
Is radon a problem in Saint Martins?
The area’s survey found 11% of 101 tested homes above Health Canada’s guideline, so a three-month test is worth doing in Saint Martins.
Does Saint Martins flood?
The inventory lists a study touching Saint Martins; whether a given street floods is on that map, not in 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).