Photo: danrmg · CC BY 2.0Hazard risk in St. Louis No. 431 is lower than in 97% of Canadian towns
Wildfire is rare near St. Louis No. 431: 0.4% of the land within 25 km has burned since 1986, a burn rate of 0.009% a year. Earthquakes matter little: NRCan’s model puts building losses at $0.004 a year per $1,000 of value, against $0.030 for the typical town. In Health Canada’s survey, 7.4% of homes tested in St. Louis No. 431’s area exceeded 200 Bq/m³, close to the typical 6.6%. Hazard risk gives St. Louis No. 431 a grade of A+; its wildfire band pulls it down.
What stands out about St. Louis No. 431’s hazards
For St. Louis No. 431, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What St. Louis No. 431 faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
St. Louis No. 431 grades A+ for hazard risk
For St. Louis No. 431, Risk will be the average of earthquakes and radon, with wildfire added only if it makes the average worse.
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.
Wildfire is rare near St. Louis No. 431: 0.4% of the land within 25 km burned since 1986, 0% within 5 km
Past fire around St. Louis No. 431’s homes, from the national burned-area record, with the fuel within 5 km.
Forty years of fire maps put St. Louis No. 431 at 0.009% a year, low next to the typical Canadian town’s 0.000%.
Nothing inside 5 km of St. Louis No. 431’s homes has burned since 1986, and the nearest scar is 10 km off.
Little near St. Louis No. 431’s homes can carry a forest fire; only 0% of the land within 5 km is forest fuel, and 1% 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 Saskatchewan · highest of 105
In the upper half in Saskatchewan but far from La Loche (1.94%): St. Louis No. 431 ranks 33rd of 105, at 0.009% 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.
7.5% of Canada’s 2,610 towns burn fast enough to rank moderate or above; St. Louis No. 431 stays low, with 92%.
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.
No flood study is listed for St. Louis No. 431
What Canada’s Flood Map Inventory lists for St. Louis No. 431: who studied flooding and where to see their maps.
No flood study on the national inventory covers St. Louis No. 431; ask the municipality, which is the authority for its flood maps.
Towns with a flood study on file
No study touches St. Louis No. 431; in Saskatchewan, 55% of towns have one, below Canada’s 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 St. Louis No. 431.
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.”
Little shaking expected in St. Louis No. 431: $0.004 a year per $1,000
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
Shaking costs the typical town $0.030 a year; in St. Louis No. 431 it is only $0.004, 0.1 times as much.
Shaking damage a year per $1,000 of building value
At $0.004, St. Louis No. 431 is below the typical town in Saskatchewan ($0.006); Weyburn is highest at $0.033.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
Nearly every one of Canada’s 2,611 towns (98%) expects more shaking damage than St. Louis No. 431.
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 St. Louis No. 431 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).
Some radon around St. Louis No. 431: 7.4% of area homes over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
Near the middle for radon: St. Louis No. 431’s area 7.4%, the typical Canadian town 6.6%. Nobody publishes radon tests for St. Louis No. 431 alone, so this card uses the figure for the Prince Albert Parkland RHA.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
St. Louis No. 431’s area, at 7.4%, is close to the median in Saskatchewan (9.1%).
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
37% of Canada’s 2,611 towns share St. Louis No. 431’s band of 5 to 10%; 26% sit 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.
A low area share in St. Louis No. 431 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 St. Louis No. 431
Environment and Climate Change Canada issues the weather alerts for St. Louis No. 431; 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 St. Louis No. 431, 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)
Hazards in the places around St. Louis No. 431
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| St. Louis No. 431 | Low | $0.004 | 7.4% | None listed |
| Wakaw 1,052 · 15 km | Low | $0.005 | 6.6% | None listed |
The fire record around Wakaw is a touch heavier than St. Louis No. 431’s, but the band is the same: low (here low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what St. Louis No. 431 faces
Practical steps for St. Louis No. 431’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?
- Ask the municipality for flood maps.
- Are flood and wildfire insured?
What this data can and can’t tell you
- Wildfire counts one way. For St. Louis No. 431, wildfire means how much nearby land burned in the past forty years, a one-way input that can pull Risk down and nothing more.
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for St. Louis No. 431’s census subdivision (a neighbourhood shows its city’s).
- Flood studies aren’t flood zones. NRCan’s inventory says where flood mapping exists, not where water goes; the map’s owner is the authority for St. Louis No. 431.
- Radon is a survey. About 14,000 homes were tested across Canada in 2009–2011, and the share over the guideline for St. Louis No. 431 is its health region’s, the survey’s design unit.
Questions about flooding and hazards in St. Louis No. 431
Is St. Louis No. 431 at risk of wildfire?
Some, but St. Louis No. 431’s low band (0.4% of nearby land burned since 1986, latest 2024) is short of the level that counts.
How is St. Louis No. 431’s Hazard risk Grade worked out?
431 A+, weighing earthquakes and radon and counting wildfire only against it.
How big is the earthquake risk in St. Louis No. 431?
In NRCan’s seismic model, St. Louis No. 431’s buildings lose $0.004 per $1,000 of value in an average year.
Does St. Louis No. 431 flood?
The inventory has 0 studies for St. Louis No. 431, and an empty list isn’t a clean bill: the municipality holds any flood maps.
Is radon a problem in St. Louis No. 431?
The area’s survey found 7.4% of 108 tested homes above Health Canada’s guideline, so a three-month test is worth doing in St. Louis No. 431.
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).