Photo: Unknown author Unknown author · Public domainAround Tisdale, 16% of tested homes have radon above the guideline
Wildfire barely registers for Tisdale, at 0% of the land within 25 km since 1986 (0.000% a year). Seismic risk runs low: $0.005 of expected damage per $1,000 of buildings a year, the typical town $0.030. Hazard risk gives Tisdale a grade of B+, from earthquakes and radon alone.
What stands out about Tisdale’s hazards
Four national sources, each read for Tisdale: earthquakes, radon, past fires and flood studies.
What Tisdale faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Tisdale grades B+ for hazard risk
Risk averages earthquakes and radon; wildfire joins only where it pulls the average down, so a town like Tisdale with little fire nearby would get no credit for it.
Its place: #57 of 104 in Saskatchewan and #1,370 of 2,589 Canadian towns.
How sure: Earthquake losses are a model’s expectation over many years, not a forecast for any one. Small fires and grass fires are largely missing from the national burned-area record.
Little of the land around Tisdale has burned: 0% within 5 km, 0% within 25 km since 1986
Fires mapped since 1986 around where Tisdale’s residents live, and the fuel next to their homes.
Fire claims 0.000% of the land around Tisdale each year, a low band, with the typical Canadian town at 0.000%.
Little near Tisdale’s homes can carry a forest fire; only 0% of the land within 5 km is forest fuel, 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 Saskatchewan · highest of 104
Near-zero burning puts Tisdale with 54 of the 104 towns in Saskatchewan, far below La Loche at 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.
Measured against 2,610 towns, Tisdale is in the largest group, low (92%), and at its floor, while 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.
Flooding around Tisdale is mapped in 2 studies, the newest by Water Security Agency
Flood studies whose area touches Tisdale, from NRCan’s inventory, each linked to its owner.
The newest of 2 studies covering Tisdale is Water Security Agency’s, from 2020; open its map to see the zones.
| Study | By | Year | Status |
|---|---|---|---|
| Tisdale | Water Security Agency | 2020 | under review · not public |
| Tisdale | Water Security Agency | 1988 | final |
Towns with a flood study on file
Flood maps are thinner in Saskatchewan, 55% of towns against 58% nationally, but Tisdale has one.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Flood mapping around Tisdale has come in steps: 2 studies from the 1980s to the 2020s.
Study dates as the NRCan inventory lists them, one count per study touching Tisdale.
Flood studies don’t enter the grade; they are listed so you can open the official map for Tisdale.
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.
Low seismic risk in Tisdale: $0.005 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.
0.2 times the typical $0.030: Tisdale’s $0.005 is low for Canada.
Shaking damage a year per $1,000 of building value
The median in Saskatchewan is $0.006; Tisdale, at $0.005, is right beside it, and Weyburn tops the list at $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.
At the bottom of Canada’s range, Tisdale has 96% of the 2,611 towns above it.
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).
Roads, pipes and bridges aren’t in Tisdale’s figure, nor landslides or tsunami: it is buildings and shaking.
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 Tisdale: 16% of area homes were over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline.
Tisdale’s area, at 16%, is above the 6.6% of the typical Canadian town, so testing is worth more here than most places.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Radon runs higher around Tisdale than in most towns in Saskatchewan: 16% against 9.1%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
One test in ten or more tops the guideline around Tisdale, as in 22% of Canada’s 2,611 towns; 4.6% go 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.
Basements, soil and how a house is sealed decide its radon, so in Tisdale only a test can say.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Radon tests: the Kelsey Trail RHA
Weather and fire alerts for Tisdale
Alerts for Tisdale 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 Tisdale 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)
Get ready for what Tisdale faces
What to do about the hazards Tisdale 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?
- Check the address on the flood map.
- 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 Tisdale.
- Radon is a survey. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Tisdale takes its 2007 health region’s share.
- Wildfire counts one way. The wildfire figure is the share of land within 25 km of Tisdale’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 Tisdale’s.
Questions about flooding and hazards in Tisdale
Is Tisdale at risk of wildfire?
Very little by the national record: Tisdale’s band is low, with 0% of the land within 25 km burned since 1986, so wildfire doesn’t change its grade.
Does Tisdale flood?
The inventory lists a study touching Tisdale; whether a given street floods is on that map, not in the grade.
Is radon a problem in Tisdale?
Around Tisdale, 100 survey homes were tested and 16% came in over 200 Bq/m³, a guide to the area, not to any one home.
How big is the earthquake risk in Tisdale?
Expected earthquake damage in Tisdale comes to $0.005 a year for each $1,000 that buildings are worth.
How is Tisdale’s Hazard risk Grade worked out?
Tisdale’s Hazard risk grade is B+, 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).