16% of homes tested in Hudson Bay’s area are above the radon guideline
Little of the land around Hudson Bay has burned: 0.9% within 25 km since 1986, or 0.02% a year. Seismic risk runs low: $0.005 of expected damage per $1,000 of buildings a year, the typical town $0.030. Hudson Bay grades B+ for hazard risk, with wildfire counted against it.
What stands out about Hudson Bay’s hazards
For Hudson Bay, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Hudson Bay faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Hudson Bay: B+
Earthquake risk and radon make Hudson Bay’s grade; wildfire can only lower it, never raise it, and flood studies are listed but not scored.
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 Hudson Bay has burned: 0% within 5 km, 0.9% within 25 km since 1986
Past fire around Hudson Bay’s homes, from the national burned-area record, with the fuel within 5 km.
Hudson Bay burns at 0.02% a year, low against 0.000% for the typical Canadian town.
Fire has stayed at least 9.0 km from Hudson Bay’s homes since 1986.
Forest fuel is denser close to Hudson Bay (28% within 5 km) than further out (18% 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 Saskatchewan · highest of 105
At 0.02% a year, Hudson Bay is near the top in Saskatchewan: 9th of 105, behind La Loche (1.94%).
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.
7.5% of Canada’s 2,610 towns burn fast enough to rank moderate or above; Hudson Bay stays low, with 92%.
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.
No flood study is listed for Hudson Bay
What Canada’s Flood Map Inventory lists for Hudson Bay: who studied flooding and where to see their maps.
The inventory has nothing for Hudson Bay, but a local or conservation-authority map may still exist.
Towns with a flood study on file
Mapping in Saskatchewan reaches 55% of towns, below the 58% across Canada, and not Hudson Bay.
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 Hudson Bay 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.”
Low seismic risk in Hudson Bay: $0.005 per $1,000 of buildings a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
Shaking costs the typical town $0.030 a year; in Hudson Bay it is only $0.005, 0.2 times as much.
Shaking damage a year per $1,000 of building value
Earthquake risk around Hudson Bay ($0.005) matches the middle in Saskatchewan ($0.006), far from Weyburn’s $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.
Hudson Bay is among Canada’s quietest towns for earthquakes: 96% of the 2,611 expect more damage.
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 Hudson Bay.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
Test for radon in Hudson Bay: 16% of area homes were over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
At 16% over the guideline, the area around Hudson Bay beats the typical Canadian town’s 6.6%. Nobody publishes radon tests for Hudson Bay alone, so this card uses the figure for the Kelsey Trail RHA.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
The median in Saskatchewan is 9.1% over 200 Bq/m³; the survey area around Hudson Bay has 16%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Hudson Bay is in the 10–20% band, with 22% of Canada’s 2,611 towns; only 4.6% are 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.
A low area share in Hudson Bay 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 Hudson Bay
Alerts for Hudson Bay 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 Hudson Bay to phones; CWFIS shows the day’s fire danger.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
How Hudson Bay’s neighbours compare on hazards
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Hudson Bay | Low | $0.005 | 16% | None listed |
| Hudson Bay No. 394 1,116 · 6.3 km | Moderate | $0.005 | 16% | Yes |
Next door, Hudson Bay No. 394 sits in a moderate fire band; Hudson Bay is low.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Hudson Bay faces
Practical steps for Hudson Bay’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. The flood inventory points to maps; it is incomplete and not the official source, so ask the municipality about any street in Hudson Bay.
- Radon is a survey. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Hudson Bay takes its 2007 health region’s share.
- Wildfire counts one way. For Hudson Bay, wildfire means how much nearby land burned in the past forty years, a one-way input that can pull Risk down and nothing more.
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Hudson Bay’s census subdivision (a neighbourhood shows its city’s).
Questions about flooding and hazards in Hudson Bay
How is Hudson Bay’s Hazard risk Grade worked out?
Hazard risk gives Hudson Bay B+, weighing earthquakes and radon and counting wildfire only against it.
How big is the earthquake risk in Hudson Bay?
NRCan’s model expects shaking to cost buildings in Hudson Bay $0.005 a year for every $1,000 of their value, on average over many years.
Does Hudson Bay flood?
The inventory has 0 studies for Hudson Bay, and an empty list isn’t a clean bill: the municipality holds any flood maps.
Is Hudson Bay at risk of wildfire?
Some, but Hudson Bay’s low band (0.9% of nearby land burned since 1986, latest 2023) is short of the level that counts.
Is radon a problem in Hudson Bay?
The area’s survey found 16% of 100 tested homes above Health Canada’s guideline, so a three-month test is worth doing in Hudson Bay.
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).