Hazard risk in Snelgrove is lower than in 89% of Canadian towns
The national fire record shows next to nothing around Snelgrove, 0% of the land within 25 km since 1986 (0.000% a year). Earthquake risk in Snelgrove is ordinary: NRCan’s model puts building losses at $0.030 a year per $1,000 of value, close to the typical town’s $0.030. Fewer homes than usual carry radon here, 0% over the guideline where the typical town has 6.6%. Snelgrove grades A for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Snelgrove’s hazards
Four national sources, each read for Snelgrove: earthquakes, radon, past fires and flood studies.
What Snelgrove faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Snelgrove: A
For Snelgrove, Risk will be the average of earthquakes and radon, with wildfire added only if it makes the average worse.
Its place: #105 of 866 in Ontario and #417 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.
Little of the land around Snelgrove has burned: 0% within 5 km, 0% within 25 km since 1986
Past fire around Snelgrove’s homes, from the national burned-area record, with the fuel within 5 km.
The land within 25 km of Snelgrove burns at 0.000% a year on average, the low band; the typical Canadian town: 0.000%.
7.3% of the land within 25 km of Snelgrove is forest fuel, yet only 0.1% within 5 km of its homes.
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 Ontario · highest of 871
To three decimals the burn rate around Snelgrove is zero, as for 638 of the 871 towns in Ontario, while Sioux Lookout reaches 0.16%.
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.
Like most of Canada’s 2,610 towns (92%), Snelgrove is in the low band, with a burn rate of zero to three decimals; 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.
Toronto Regional Conservation Authority has mapped flooding for Snelgrove (1 study)
What Canada’s Flood Map Inventory lists for Snelgrove: who studied flooding and where to see their maps.
Toronto Regional Conservation Authority studied flooding in an area that includes Snelgrove (2021); open its map to see which streets lie in a flood zone.
| Study | By | Year | Status |
|---|---|---|---|
| Toronto Floodline Consolidation | Toronto Regional Conservation Authority | 2021 | final |
Towns with a flood study on file
Its flood study puts Snelgrove with 69% of towns in Ontario; Canada’s share is 58%.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Listed, not scored: a flood study proves a map exists, not that Snelgrove floods.
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.
Expected shaking damage in Snelgrove: $0.030 a year per $1,000
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
At $0.030 per $1,000, Snelgrove’s earthquake risk is the typical Canadian town’s $0.030.
Shaking damage a year per $1,000 of building value
The typical town in Ontario expects $0.043 a year in shaking damage; Snelgrove expects less, $0.030, and Alexandria the most, $0.21.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
Snelgrove’s earthquake risk lands near the centre of Canada’s range; 48% of the 2,611 towns are higher.
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 loss is to Snelgrove’s buildings alone, from ground shaking; infrastructure and secondary hazards are left out.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean). · Earthquake risk: the city of Brampton
0% of homes tested around Snelgrove are over the radon guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
At 0% over the guideline, the area around Snelgrove is under the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
The median in Ontario is 4% over 200 Bq/m³; around Snelgrove it is 0%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
63% of Canada’s 2,611 towns have a higher share of homes over 200 Bq/m³ than Snelgrove’s band, which holds 37%.
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.
Basements, soil and how a house is sealed decide its radon, so in Snelgrove only a test can say.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Radon tests: one figure for all of the Peel Regional Health Unit
Weather and fire alerts for Snelgrove
Alerts for Snelgrove 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. |
Evacuation orders for Snelgrove come from the municipality or the province, while CWFIS maps fire danger every day.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Snelgrove
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Snelgrove | Low | $0.030 | 0% | Yes |
| Heart Lake North 8,539 · 1.5 km | Low | $0.030 | 0% | Yes |
| Van Kirk 10,014 · 1.8 km | Low | $0.030 | 0% | Yes |
| Heart Lake South 19,573 · 2.9 km | Low | $0.030 | 0% | Yes |
| Fletchers Meadow North 11,870 · 3.0 km | Low | $0.030 | 0% | Yes |
| Rosedale Village 5,764 · 3.6 km | Low | $0.030 | 0% | Yes |
| Fletchers Meadow South 9,214 · 3.8 km | Low | $0.030 | 0% | Yes |
Among its neighbours Snelgrove has the most fire on record (low); Heart Lake North follows (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Snelgrove faces
Practical steps for Snelgrove’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
- 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 Snelgrove until then.
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Snelgrove without grading them.
- Earthquakes are modelled. Shaking damage is modelled from the ground, the buildings and the odds of each quake, and published for whole subdivisions such as Snelgrove’s.
- Wildfire counts one way. The wildfire figure is the share of land within 25 km of Snelgrove’s homes burned each year from 1986 to 2025, past fire rather than a forecast, and it can only lower Risk.
Questions about flooding and hazards in Snelgrove
How is Snelgrove’s Hazard risk Grade worked out?
Snelgrove’s Hazard risk grade is A, built on earthquakes and radon with a one-sided wildfire input.
How big is the earthquake risk in Snelgrove?
In NRCan’s seismic model, Snelgrove’s buildings lose $0.030 per $1,000 of value in an average year.
Is radon a problem in Snelgrove?
0% of the 90 homes Health Canada tested around Snelgrove topped the guideline; your own house needs its own test.
Does Snelgrove flood?
A flood study covers Snelgrove on Canada’s Flood Map Inventory; open the owner’s map to check a street, since flood isn’t graded.
Is Snelgrove at risk of wildfire?
Hardly at all on record: 0% of the land within 25 km of Snelgrove since 1986, a low band, though small grass fires aren’t mapped.
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).