Hazard risk in Lee Ridge is lower than in 98% of Canadian towns
Fire has left almost no mark near Lee Ridge: 0% of the land within 25 km since 1986, 0.000% a year. Seismic risk runs low: $0.013 of expected damage per $1,000 of buildings a year, the typical town $0.030. In Health Canada’s survey, just 1.4% of homes tested in the area exceeded 200 Bq/m³ (6.6% typical). Hazard risk gives Lee Ridge a grade of A+; its wildfire band pulls it down.
What stands out about Lee Ridge’s hazards
For Lee Ridge, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Lee Ridge faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Lee Ridge grades A+ for hazard risk
Seismic risk and radon set Lee Ridge’s grade, wildfire can drag it down, and flood mapping stays out of it.
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. The radon share rests on 73 home tests in the survey area, so a few homes move it. The burned-area record misses fires under about 10 ha and most grass and farm fires.
Wildfire is rare near Lee Ridge: 0% of the land within 25 km burned since 1986, 0% within 5 km
Fires mapped since 1986 around where Lee Ridge’s residents live, and the fuel next to their homes.
The land within 25 km of Lee Ridge burns at 0.000% a year on average, the low band; the typical Canadian town: 0.000%.
With 0% forest fuel within 5 km and 0.3% within 25 km, the land around Lee Ridge gives a fire little to burn.
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
Near-zero burning puts Lee Ridge with 386 of the 478 towns in Alberta, far below Wainwright at 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.
Lee Ridge shares the low band with 92% of Canada’s 2,610 towns, its burn rate rounding to nothing; 7.5% burn faster.
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 Lee Ridge
Flood studies whose area touches Lee Ridge, from NRCan’s inventory, each linked to its owner.
The inventory has nothing for Lee Ridge, but a local or conservation-authority map may still exist.
Towns with a flood study on file
No study touches Lee Ridge; in Alberta, 46% 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.
Flood mapping is shown for Lee Ridge 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.”
Low seismic risk in Lee Ridge: $0.013 per $1,000 of buildings a year
NRCan’s seismic risk model: the damage shaking is expected to do to buildings each year, on average over many years.
At $0.013 per $1,000, Lee Ridge carries 0.4 times the typical Canadian town’s earthquake risk ($0.030): low.
Nobody publishes earthquake risk for Lee Ridge alone, so this card uses the figure for the city of Edmonton.
Shaking damage a year per $1,000 of building value
Earthquake risk around Lee Ridge ($0.013) matches the middle in Alberta ($0.013), far from Black Diamond’s $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.
Toward the quiet end of Canada’s range: 75% of its 2,611 towns sit above Lee Ridge.
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).
Only shaking damage to buildings in Lee Ridge is counted; landslides, liquefaction, tsunami and fire after a quake aren’t.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
1.4% of homes tested around Lee Ridge are over the radon guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline.
Lee Ridge’s survey area reads 1.4% over the guideline, under the typical Canadian town’s 6.6%. For radon tests, the only official count covers all of the Capital Health, Lee Ridge included.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
The median in Alberta is 7.5% over 200 Bq/m³; around Lee Ridge it is 1.4%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Few tests over the guideline: Lee Ridge shares the bottom band with 37% of Canada’s 2,611 towns, below the other 63%.
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 Lee Ridge 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 Lee Ridge
Alerts for Lee Ridge 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 Lee Ridge 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 Lee Ridge
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Lee Ridge | Low | $0.013 | 1.4% | None listed |
| Richfield 3,456 · 0.9 km | Low | $0.013 | 1.4% | None listed |
| Tweddle Place 5,211 · 0.9 km | Low | $0.013 | 1.4% | None listed |
| Kameyosek 2,761 · 1.1 km | Low | $0.013 | 1.4% | None listed |
| Tipaskan 2,875 · 1.2 km | Low | $0.013 | 1.4% | None listed |
| Greenview 2,822 · 1.5 km | Low | $0.013 | 1.4% | None listed |
| Hillview 5,473 · 1.6 km | Low | $0.013 | 1.4% | None listed |
Fire is no heavier anywhere nearby than around Lee Ridge (low), with Richfield next at low.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Lee Ridge faces
Practical steps for Lee Ridge’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
- Flood studies aren’t flood zones. A study’s area can be a whole watershed or province, so being on the inventory says a map exists, not that a home in Lee Ridge floods.
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Lee Ridge’s census subdivision (a neighbourhood shows its city’s).
- Wildfire counts one way. For Lee Ridge, wildfire means how much nearby land burned in the past forty years, a one-way input that can pull Risk down and nothing more.
- Radon is a survey. The radon share comes from about 14,000 long-term home tests in 2009–2011, pooled for now by the 2007 health region Lee Ridge sits in.
Questions about flooding and hazards in Lee Ridge
Is radon a problem in Lee Ridge?
1.4% of the 73 homes Health Canada tested around Lee Ridge topped the guideline; your own house needs its own test.
How big is the earthquake risk in Lee Ridge?
About $0.013 a year per $1,000 of building value, NRCan’s long-run expectation for Lee Ridge.
Does Lee Ridge flood?
No study on Canada’s Flood Map Inventory covers Lee Ridge (0), which doesn’t mean it has never been mapped, so ask the municipality.
How is Lee Ridge’s Hazard risk Grade worked out?
Lee Ridge’s Hazard risk grade is A+, built on earthquakes and radon with a one-sided wildfire input.
Is Lee Ridge at risk of wildfire?
Very little by the national record: Lee Ridge’s band is low, with 0% of the land within 25 km burned since 1986, so wildfire doesn’t change its grade.
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).