Photo: RockyRoller · CC BY-SA 4.0Around Stonewall, 25% of tested homes have radon above the guideline
The national fire record shows next to nothing around Stonewall, 0% of the land within 25 km since 1986 (0.000% a year). Shaking is less of a worry than in most places, at $0.004 a year per $1,000 of building value ($0.030 typical). Hazard risk gives Stonewall a grade of B, from earthquakes and radon alone.
What stands out about Stonewall’s hazards
Four national sources, each read for Stonewall: earthquakes, radon, past fires and flood studies.
What Stonewall faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Stonewall: B
Risk averages earthquakes and radon; wildfire joins only where it pulls the average down, so a town like Stonewall with little fire nearby would get no credit for it.
Its place: #137 of 185 in Manitoba and #1,428 of 2,589 Canadian towns.
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.
Wildfire is rare near Stonewall: 0% of the land within 25 km burned since 1986, 0% within 5 km
Past fire around Stonewall’s homes, from the national burned-area record, with the fuel within 5 km.
Around Stonewall fire takes 0.000% of the land in a typical year, the typical Canadian town 0.000%, which is low.
Forest makes up 0% of the land within 5 km of Stonewall and 0% within 25 km, little for a forest fire to run through.
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
Among the 189 towns in Manitoba, Flin Flon (Part) burns fastest (1.68% a year); Stonewall is with the 60 near zero.
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.
92% of Canada’s 2,610 towns are in the low band and 7.5% above it; Stonewall is among the many where the yearly burn rate 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.
The flood map inventory lists nothing for Stonewall
What Canada’s Flood Map Inventory lists for Stonewall: who studied flooding and where to see their maps.
There is no study for Stonewall on the national flood inventory, which is far from complete.
Towns with a flood study on file
Only 18% of towns in Manitoba have a flood study, short of Canada’s 58%, and Stonewall is not among them.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Flood studies don’t enter the grade; they are listed so you can open the official map for Stonewall.
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.”
Low seismic risk in Stonewall: $0.004 per $1,000 of buildings a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
Stonewall’s $0.004 is a fraction of the typical town’s $0.030 (0.1 times as much): quiet ground by Canadian standards.
Shaking damage a year per $1,000 of building value
Stonewall’s $0.004 sits under the median in Manitoba, $0.006, and well under Virden’s $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, Stonewall has 98% 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).
The model counts damage to Stonewall’s buildings and their occupants from shaking only: not liquefaction, landslides, tsunami or fires after a quake.
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 Stonewall: 25% of area homes were over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
Radon runs above the typical Canadian town (6.6%) in Stonewall’s area, at 25%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Stonewall’s area, at 25%, is above the median in Manitoba (12%).
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Stonewall is in the 20–30% band, which holds only 3.1% of Canada’s 2,611 towns; 1.5% 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 survey sampled homes around Stonewall; it can’t tell you your basement’s level.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Radon tests published for the Interlake health region, not by town
Weather and fire alerts for Stonewall
Alerts for Stonewall 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. |
Alert Ready carries evacuation orders for Stonewall to phones; CWFIS shows the day’s fire danger.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
How Stonewall’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 |
|---|---|---|---|---|
| Stonewall | Low | $0.004 | 25% | None listed |
| Stony Mountain 9,180 · 11 km | Low | $0.005 | 25% | None listed |
Stony Mountain burns a little more than Stonewall, 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 Stonewall faces
What to do about the hazards Stonewall 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
- 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 Stonewall until then.
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Stonewall without grading them.
- Earthquakes are modelled. NRCan models what earthquakes would cost buildings each year on average, subdivision by subdivision; Stonewall’s figure is its subdivision’s.
- Wildfire counts one way. Wildfire is read from the national burned-area record around Stonewall’s homes since 1986, a history of fire that may lower Risk but never raises it.
Questions about flooding and hazards in Stonewall
How big is the earthquake risk in Stonewall?
NRCan’s model expects shaking to cost buildings in Stonewall $0.004 a year for every $1,000 of their value, on average over many years.
Does Stonewall flood?
Nothing is listed for Stonewall on the national inventory (0); local maps may still exist with the municipality.
Is radon a problem in Stonewall?
In Health Canada’s survey, 25% of 121 homes tested in Stonewall’s area were above 200 Bq/m³, though only a test tells you about one house.
How is Stonewall’s Hazard risk Grade worked out?
Stonewall’s Hazard risk grade is B, built on earthquakes and radon with a one-sided wildfire input.
Is Stonewall at risk of wildfire?
No meaningful wildfire history near Stonewall: 0% of nearby land since 1986, band low.
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).