25% of homes tested in Dewdney East’s area are above the radon guideline
For Dewdney East, wildfire history is close to nil: 0% of nearby land since 1986, 0.000% a year. Seismic risk runs low: $0.014 of expected damage per $1,000 of buildings a year, the typical town $0.030. Hazard risk gives Dewdney East a grade of C+, from earthquakes and radon alone.
What stands out about Dewdney East’s hazards
For Dewdney East, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Dewdney East faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Dewdney East: C+
Earthquake risk and radon make Dewdney East’s grade; wildfire can only lower it, never raise it, and flood studies are listed but not scored.
Its place: #74 of 104 in Saskatchewan and #2,005 of 2,589 Canadian towns.
How sure: Earthquake losses are a model’s expectation over many years, not a forecast for any one. The burned-area record misses fires under about 10 ha and most grass and farm fires.
Little of the land around Dewdney East has burned: 0% within 5 km, 0% within 25 km since 1986
Fires mapped since 1986 around where Dewdney East’s residents live, and the fuel next to their homes.
Dewdney East burns at 0.000% a year, low against 0.000% for the typical Canadian town.
With 0% forest fuel within 5 km and 0% within 25 km, the land around Dewdney East 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 Saskatchewan · highest of 104
La Loche has the highest burn rate in Saskatchewan, 1.94% a year; around Dewdney East, as around 54 of the 104 towns, it rounds to 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.
Only 7.5% of Canada’s 2,610 towns are above the low band, which holds 92%; Dewdney East, at a rounded zero, is far from them.
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.
Dewdney East is on the flood map inventory: 2 studies, latest by Water Security Agency
Flood studies whose area touches Dewdney East, from NRCan’s inventory, each linked to its owner.
2 studies on the inventory touch Dewdney East, the newest Water Security Agency’s from 2025, and their areas can be large, so they say maps exist, not that the town floods.
| Study | By | Year | Status |
|---|---|---|---|
| Regina Flood Mapping Study | Water Security Agency | 2025 | final |
| Regina | Water Security Agency | 2020 | under review · not public |
Towns with a flood study on file
Flood maps are thinner in Saskatchewan, 55% of towns against 58% nationally, but Dewdney East has one.
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 Dewdney East 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.
Earthquakes cost buildings in Dewdney East just $0.014 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.
Shaking costs the typical town $0.030 a year; in Dewdney East it is only $0.014, 0.5 times as much.
For earthquake risk, the only official count covers all of the city of Regina, Dewdney East included.
Shaking damage a year per $1,000 of building value
Dewdney East’s $0.014 tops the median in Saskatchewan, $0.006, though Weyburn reaches $0.033.
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: 73% of its 2,611 towns sit above Dewdney East.
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).
For Dewdney East the model prices shaking damage to buildings, nothing more.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
Radon runs high around Dewdney East: 25% of tested homes over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline.
Dewdney East’s survey area reads 25% over the guideline, well past the typical Canadian town’s 6.6%. Dewdney East doesn’t get its own radon tests figures; the ones here come from the Regina Qu'Appelle RHA.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Radon runs higher around Dewdney East than in most towns in Saskatchewan: 25% over the guideline (9.1% is typical), 4.3% over 600.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
One home in five or more tests over the guideline around Dewdney East; 3.1% of Canada’s 2,611 towns are in that band and 1.5% 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.
Health Canada advises testing every home, Dewdney East’s included, whatever the area’s figure.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Where to get warnings in Dewdney East
Alerts for Dewdney East 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 Dewdney East 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 Dewdney East
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Dewdney East | Low | $0.014 | 25% | Yes |
| Al Ritchie 8,087 · 2.7 km | Low | $0.014 | 25% | Yes |
| Boothill 2,613 · 3.1 km | Low | $0.014 | 25% | Yes |
| Arcola East 33,823 · 3.5 km | Low | $0.014 | 25% | Yes |
| Heritage 5,172 · 3.8 km | Low | $0.014 | 25% | Yes |
| Northeast 9,670 · 4.5 km | Low | $0.014 | 25% | None listed |
| Dewdney Place 3,021 · 4.6 km | Low | $0.014 | 25% | Yes |
Among its neighbours Dewdney East has the most fire on record (low); Al Ritchie follows (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Dewdney East faces
Practical steps for Dewdney East’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
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Dewdney East’s census subdivision (a neighbourhood shows its city’s).
- Flood studies aren’t flood zones. The flood inventory points to maps; it is incomplete and not the official source, so ask the municipality about any street in Dewdney East.
- Wildfire counts one way. For Dewdney East, 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. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Dewdney East takes its 2007 health region’s share.
Questions about flooding and hazards in Dewdney East
Is radon a problem in Dewdney East?
The area’s survey found 25% of 94 tested homes above Health Canada’s guideline, so a three-month test is worth doing in Dewdney East.
Does Dewdney East flood?
The inventory lists a study touching Dewdney East; whether a given street floods is on that map, not in the grade.
How is Dewdney East’s Hazard risk Grade worked out?
Hazard risk gives Dewdney East C+, weighing earthquakes and radon and counting wildfire only against it.
Is Dewdney East at risk of wildfire?
Hardly at all on record: 0% of the land within 25 km of Dewdney East since 1986, a low band, though small grass fires aren’t mapped.
How big is the earthquake risk in Dewdney East?
About $0.014 a year per $1,000 of building value, NRCan’s long-run expectation for Dewdney East.
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).