Few places are as safe from hazards as Terwillegar Towne: it beats 98% of Canadian towns
Fire has left almost no mark near Terwillegar Towne: 0% of the land within 25 km since 1986, 0.000% a year. Earthquakes matter little: NRCan’s model puts building losses at $0.013 a year per $1,000 of value, against $0.030 for the typical town. Radon is lower than usual: 1.4% of tested homes in the survey area topped the guideline, against 6.6% for the typical town. Terwillegar Towne grades A+ for hazard risk, with wildfire counted against it.
What stands out about Terwillegar Towne’s hazards
Four national sources, each read for Terwillegar Towne: earthquakes, radon, past fires and flood studies.
What Terwillegar Towne faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Terwillegar Towne: A+
Two inputs always count for Terwillegar Towne, earthquakes and radon; the third, wildfire, counts only against a town.
Its place: #11 of 474 in Alberta and #22 of 2,589 Canadian towns.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. Only 73 homes were tested in the survey area, so the radon share is rough. Small fires and grass fires are largely missing from the national burned-area record.
Wildfire is rare near Terwillegar Towne: 0% of the land within 25 km burned since 1986, 0% within 5 km
Fires mapped since 1986 around where Terwillegar Towne’s residents live, and the fuel next to their homes.
In a typical year 0.000% of the land near Terwillegar Towne burns; the typical Canadian town sees 0.000%, and both are low.
The closest burn since 1986 lies 19 km from Terwillegar Towne’s homes, none within 5 km.
Land that isn’t forest covers nearly all the ground around Terwillegar Towne: forest fuel is 1.3% within 5 km and 0.5% 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 Alberta · highest of 478
To three decimals the burn rate around Terwillegar Towne is zero, as for 386 of the 478 towns in Alberta, while Wainwright reaches 1.43%.
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%), Terwillegar Towne 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.
The flood map inventory lists nothing for Terwillegar Towne
Flood studies whose area touches Terwillegar Towne, from NRCan’s inventory, each linked to its owner.
Nationally, Terwillegar Towne has no listed flood study; the municipality is the place to ask.
Towns with a flood study on file
Flood maps are thinner in Alberta, 46% of towns against 58% nationally, and Terwillegar Towne has none.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Flood mapping is shown for Terwillegar Towne to be opened and checked, never turned into a grade.
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 Terwillegar Towne: $0.013 a year per $1,000
NRCan’s seismic risk model: the damage shaking is expected to do to buildings each year, on average over many years.
0.4 times the typical $0.030: Terwillegar Towne’s $0.013 is low for Canada.
Nobody publishes earthquake risk for Terwillegar Towne alone, so this card uses the figure for the city of Edmonton.
Shaking damage a year per $1,000 of building value
Neither high nor low in Alberta: Terwillegar Towne’s $0.013 sits by the median of $0.013, while Black Diamond reaches $0.048.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
75% of Canada’s 2,611 towns expect more shaking damage than Terwillegar Towne.
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 Terwillegar Towne’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).
Little radon around Terwillegar Towne: 1.4% of area homes over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline. · Measured across the Capital Health: radon tests
Radon runs below the typical Canadian town (6.6%) in Terwillegar Towne’s area, at 1.4%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Fewer homes top the guideline around Terwillegar Towne (1.4%) than in the typical town in Alberta (7.5%).
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Radon rarely tops the guideline around Terwillegar Towne, as for 37% of Canada’s 2,611 towns; 63% see more.
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 Terwillegar Towne; it can’t tell you your basement’s level.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Terwillegar Towne
Alerts for Terwillegar Towne 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 Terwillegar Towne to phones; CWFIS shows the day’s fire danger.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Terwillegar Towne
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Terwillegar Towne | Low | $0.013 | 1.4% | None listed |
| Leger 4,108 · 1.0 km | Low | $0.013 | 1.4% | None listed |
| Magrath Heights 3,728 · 1.3 km | Low | $0.013 | 1.4% | None listed |
| South Terwillegar 8,183 · 1.4 km | Low | $0.013 | 1.4% | None listed |
| Haddow 4,026 · 1.4 km | Low | $0.013 | 1.4% | Yes |
| Ogilvie Ridge 5,218 · 1.8 km | Low | $0.013 | 1.4% | Yes |
| Mactaggart 3,603 · 1.9 km | Low | $0.013 | 1.4% | None listed |
None of the places around has more fire nearby than Terwillegar Towne (low); Leger comes closest (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Terwillegar Towne faces
What to do about the hazards Terwillegar Towne 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
- Wildfire counts one way. The wildfire figure is the share of land within 25 km of Terwillegar Towne’s homes burned each year from 1986 to 2025, past fire rather than a forecast, and it can only lower Risk.
- 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 Terwillegar Towne’s.
- 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 Terwillegar Towne until then.
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Terwillegar Towne without grading them.
Questions about flooding and hazards in Terwillegar Towne
Is radon a problem in Terwillegar Towne?
Around Terwillegar Towne, 73 survey homes were tested and 1.4% came in over 200 Bq/m³, a guide to the area, not to any one home.
How big is the earthquake risk in Terwillegar Towne?
About $0.013 a year per $1,000 of building value, NRCan’s long-run expectation for Terwillegar Towne.
Is Terwillegar Towne at risk of wildfire?
Fire has reached 0% of the land around Terwillegar Towne since 1986 (last in 2023); at low, it neither helps nor hurts the grade.
Does Terwillegar Towne flood?
With 0 studies on the inventory, Terwillegar Towne’s flood risk is unmapped nationally; check with the municipality before buying.
How is Terwillegar Towne’s Hazard risk Grade worked out?
Terwillegar Towne’s Hazard risk grade is A+, built on earthquakes and radon with a one-sided wildfire input.
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).