Tweddle Place faces fewer hazards than 98% of Canadian towns
Around Tweddle Place, wildfire is practically absent from the record: 0% within 25 km since 1986, 0.000% a year. Shaking is less of a worry than in most places, at $0.013 a year per $1,000 of building value ($0.030 typical). Radon is lower than usual: 1.4% of tested homes in the survey area topped the guideline, against 6.6% for the typical town. Hazard risk gives Tweddle Place a grade of A+; its wildfire band pulls it down.
What stands out about Tweddle Place’s hazards
For Tweddle Place, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Tweddle Place faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Tweddle Place grades A+ for hazard risk
For Tweddle Place, Risk will be the average of earthquakes and radon, with wildfire added only if it makes the average worse.
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 Tweddle Place: 0% of the land within 25 km burned since 1986, 0% within 5 km
Fires mapped since 1986 around where Tweddle Place’s residents live, and the fuel next to their homes.
At 0.000% of the land a year, Tweddle Place’s burn rate is in the low band; the typical Canadian town sees 0.000%.
Land that isn’t forest covers nearly all the ground around Tweddle Place: forest fuel is 0% within 5 km and 0.3% 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
Among the 478 towns in Alberta, Wainwright burns fastest (1.43% a year); Tweddle Place is with the 386 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.
The low band holds 92% of Canada’s 2,610 towns, and Tweddle Place sits at its very bottom; only 7.5% are above it.
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 Tweddle Place
Flood studies whose area touches Tweddle Place, from NRCan’s inventory, each linked to its owner.
There is no study for Tweddle Place on the national flood inventory, which is far from complete.
Towns with a flood study on file
Only 46% of towns in Alberta have a flood study, short of Canada’s 58%, and Tweddle Place 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 Tweddle Place.
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 Tweddle Place just $0.013 per $1,000 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, Tweddle Place carries 0.4 times the typical Canadian town’s earthquake risk ($0.030): low.
Figures for earthquake risk are published for the city of Edmonton as a whole, not for Tweddle Place alone.
Shaking damage a year per $1,000 of building value
Neither high nor low in Alberta: Tweddle Place’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 Tweddle Place.
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 Tweddle Place.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
Radon runs low around Tweddle Place: 1.4% of tested homes over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline.
A lower share than most: 1.4% of tested homes around Tweddle Place, the typical Canadian town 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Tweddle Place’s area, at 1.4%, is below the median in Alberta (7.5%).
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Under 5% puts Tweddle Place with 37% of Canada’s 2,611 towns; 63% have more high tests.
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, Tweddle Place’s included, whatever the area’s figure.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Radon tests: one figure for all of the Capital Health
Where to get warnings in Tweddle Place
Alerts for Tweddle Place 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. |
Fire danger and active fires near Tweddle Place are mapped daily by the Canadian Wildland Fire Information System; evacuation orders come from the municipality or province.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Tweddle Place
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Tweddle Place | Low | $0.013 | 1.4% | None listed |
| Lee Ridge 2,722 · 0.9 km | Low | $0.013 | 1.4% | None listed |
| Richfield 3,456 · 1.1 km | Low | $0.013 | 1.4% | None listed |
| Tipaskan 2,875 · 1.9 km | Low | $0.013 | 1.4% | None listed |
| Greenview 2,822 · 1.9 km | Low | $0.013 | 1.4% | None listed |
| Kameyosek 2,761 · 2.0 km | Low | $0.013 | 1.4% | None listed |
| Hillview 5,473 · 2.4 km | Low | $0.013 | 1.4% | None listed |
Among its neighbours Tweddle Place has the most fire on record (low); Lee Ridge follows (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Tweddle Place faces
Practical steps for Tweddle Place’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. Flood studies cover areas of every size, which is why the page lists them for Tweddle Place 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 Tweddle Place until then.
- Wildfire counts one way. Burned land within 25 km of where people live, averaged over 1986–2025 and checked for fuel near homes, is the measure; it looks back, not ahead, and only ever counts against Tweddle Place.
- Earthquakes are modelled. The earthquake figure is an expected loss, not a forecast, worked out by NRCan for each census subdivision, Tweddle Place’s included.
Questions about flooding and hazards in Tweddle Place
Is radon a problem in Tweddle Place?
1.4% of the 73 homes Health Canada tested around Tweddle Place topped the guideline; your own house needs its own test.
Does Tweddle Place flood?
No study on Canada’s Flood Map Inventory covers Tweddle Place (0), which doesn’t mean it has never been mapped, so ask the municipality.
How is Tweddle Place’s Hazard risk Grade worked out?
Hazard risk gives Tweddle Place A+, weighing earthquakes and radon and counting wildfire only against it.
How big is the earthquake risk in Tweddle Place?
About $0.013 a year per $1,000 of building value, NRCan’s long-run expectation for Tweddle Place.
Is Tweddle Place at risk of wildfire?
No meaningful wildfire history near Tweddle Place: 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).