Photo: Bluejaywpg · Public domainRadon is Stony Mountain’s main hazard: 25% of tested homes in its area top Health Canada’s guideline
Burn scars are few around Stony Mountain, with 0.4% of the land within 25 km touched by fire since 1986 (0.01% a year). Seismic risk runs low: $0.005 of expected damage per $1,000 of buildings a year, the typical town $0.030. Stony Mountain grades B for hazard risk, with wildfire counted against it.
What stands out about Stony Mountain’s hazards
For Stony Mountain, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Stony Mountain faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Stony Mountain grades B for hazard risk
The grade weighs Stony Mountain’s seismic risk and radon equally, and wildfire is one-sided: a high band counts against a town, a low one earns nothing.
Its place: #141 of 185 in Manitoba and #1,472 of 2,589 Canadian towns.
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 Stony Mountain: 0.4% of the land within 25 km burned since 1986, 0% within 5 km
Past fire around Stony Mountain’s homes, from the national burned-area record, with the fuel within 5 km.
Next to the typical Canadian town (0.000% a year), Stony Mountain’s 0.01% is in the low band.
The 5 km ring around Stony Mountain’s homes is clear of burns since 1986, the nearest 14 km out.
Forest fuel is scarce around Stony Mountain: 0% of the land within 5 km, 0% 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 Manitoba · highest of 189
The land around Stony Mountain burns at 0.01% a year, the 25th highest rate of 189 towns in Manitoba; Flin Flon (Part) tops it at 1.68%.
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.
Stony Mountain is in the low band with 92% of Canada’s 2,610 towns; 7.5% sit in moderate or 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 Stony Mountain
What Canada’s Flood Map Inventory lists for Stony Mountain: who studied flooding and where to see their maps.
No flood study on the national inventory covers Stony Mountain; ask the municipality, which is the authority for its flood maps.
Towns with a flood study on file
Only 18% of towns in Manitoba have a flood study, short of Canada’s 58%, and Stony Mountain is not among them.
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 Stony Mountain.
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 Stony Mountain just $0.005 per $1,000 a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
0.2 times the typical $0.030: Stony Mountain’s $0.005 is low for Canada.
Shaking damage a year per $1,000 of building value
The median in Manitoba is $0.006; Stony Mountain, at $0.005, is right beside it, and Virden tops the list at $0.007.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
At the bottom of Canada’s range, Stony Mountain has 96% of the 2,611 towns above it.
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 Stony Mountain.
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 Stony Mountain: 25% of area homes were over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
More homes than usual test high around Stony Mountain: 25% against 6.6% for the typical Canadian town. Behind radon tests sits data gathered across the Interlake health region, with Stony Mountain one part of it.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Radon runs higher around Stony Mountain than in most towns in Manitoba: 25% against 12%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
One home in five or more tests over the guideline around Stony Mountain; 3.1% of Canada’s 2,611 towns are in that band and 1.5% 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.
Health Canada advises testing every home, Stony Mountain’s included, whatever the area’s figure.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Where to get warnings in Stony Mountain
Environment and Climate Change Canada issues the weather alerts for Stony Mountain; 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 Stony Mountain, 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 Stony Mountain’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 |
|---|---|---|---|---|
| Stony Mountain | Low | $0.005 | 25% | None listed |
| Stonewall 5,443 · 11 km | Low | $0.004 | 25% | None listed |
| St. Andrews 12,021 · 18 km | Moderate | $0.005 | 25% | None listed |
The heaviest fire record nearby is St. Andrews’s, moderate to Stony Mountain’s low.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Stony Mountain faces
What to do about the hazards Stony Mountain 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.
- 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
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Stony Mountain without grading them.
- 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 Stony Mountain until then.
- Wildfire counts one way. For Stony Mountain, 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 Stony Mountain’s census subdivision (a neighbourhood shows its city’s).
Questions about flooding and hazards in Stony Mountain
How is Stony Mountain’s Hazard risk Grade worked out?
Stony Mountain’s Hazard risk grade is B, built on earthquakes and radon with a one-sided wildfire input.
Is Stony Mountain at risk of wildfire?
Fire has reached 0.4% of the land around Stony Mountain since 1986 (last in 2012); at low, it neither helps nor hurts the grade.
Is radon a problem in Stony Mountain?
Around Stony Mountain, 121 survey homes were tested and 25% came in over 200 Bq/m³, a guide to the area, not to any one home.
How big is the earthquake risk in Stony Mountain?
NRCan’s model expects shaking to cost buildings in Stony Mountain $0.005 a year for every $1,000 of their value, on average over many years.
Does Stony Mountain flood?
With 0 studies on the inventory, Stony Mountain’s flood risk is unmapped nationally; check with the municipality before buying.
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).