Photo: Amakuha · CC BY 4.0St.Andrew-Windfields is on Canada’s flood inventory: 1 listed, led by Toronto Regional Conservation Authority
The burned-area map is nearly blank around St.Andrew-Windfields, 0% within 25 km since 1986, 0.001% a year. For earthquakes St.Andrew-Windfields is middling, $0.043 a year per $1,000 against $0.030 for the typical town. Fewer homes than usual carry radon here, 2.7% over the guideline where the typical town has 6.6%. St.Andrew-Windfields grades A− for hazard risk, with wildfire counted against it.
What stands out about St.Andrew-Windfields’s hazards
Four national sources, each read for St.Andrew-Windfields: earthquakes, radon, past fires and flood studies.
What St.Andrew-Windfields faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
St.Andrew-Windfields grades A− for hazard risk
For St.Andrew-Windfields, Risk will be the average of earthquakes and radon, with wildfire added only if it makes the average worse.
Its place: #285 of 866 in Ontario and #700 of 2,589 Canadian towns.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. Only 74 homes were tested in the survey area, so the radon share is rough. Small fires and grass fires are largely missing from the national burned-area record.
Wildfire is rare near St.Andrew-Windfields: 0% of the land within 25 km burned since 1986, 0% within 5 km
Fires mapped since 1986 around where St.Andrew-Windfields’ residents live, and the fuel next to their homes.
Low: the land around St.Andrew-Windfields burns at 0.001% a year, where the typical Canadian town sees 0.000%.
Since 1986 the nearest fire to St.Andrew-Windfields’ homes came within 21 km, never inside 5 km.
Little near St.Andrew-Windfields’ homes can carry a forest fire; only 0.2% of the land within 5 km is forest fuel, and 2.3% 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 Ontario · highest of 871
St.Andrew-Windfields ranks 83rd of the 871 towns in Ontario for burn rate, at 0.001% a year; Sioux Lookout leads with 0.16%.
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.
Low, like 92% of the country’s 2,610 towns: the land around St.Andrew-Windfields burns, but slower than in the 7.5% 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.
St.Andrew-Windfields is on the flood map inventory: 1 study, by Toronto Regional Conservation Authority
Flood studies whose area touches St.Andrew-Windfields, from NRCan’s inventory, each linked to its owner.
Toronto Regional Conservation Authority holds the flood mapping that covers St.Andrew-Windfields (2021), linked below.
| Study | By | Year | Status |
|---|---|---|---|
| Toronto Floodline Consolidation | Toronto Regional Conservation Authority | 2021 | final |
Towns with a flood study on file
69% of towns in Ontario have a flood study, more than Canada’s 58%; St.Andrew-Windfields has one too.
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 St.Andrew-Windfields 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.
Expected shaking damage in St.Andrew-Windfields: $0.043 a year per $1,000
NRCan’s seismic risk model: the damage shaking is expected to do to buildings each year, on average over many years.
Nothing unusual about St.Andrew-Windfields’ ground: $0.043 against a typical $0.030, 1.4 times.
Shaking damage a year per $1,000 of building value
St.Andrew-Windfields’ $0.043 is close to the median in Ontario, $0.043; Alexandria is highest at $0.21.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
St.Andrew-Windfields’ earthquake risk lands near the centre of Canada’s range; 36% of the 2,611 towns are higher.
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).
The loss is to St.Andrew-Windfields’ buildings alone, from ground shaking; infrastructure and secondary hazards are left out.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean). · Earthquake risk published for the city of Toronto, not by town
2.7% of homes tested around St.Andrew-Windfields are over the radon guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline. · The radon tests numbers here cover the City of Toronto Health Unit
At 2.7% over the guideline, the area around St.Andrew-Windfields is under the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
The median in Ontario is 4% over 200 Bq/m³; around St.Andrew-Windfields it is 2.7%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Under 5% puts St.Andrew-Windfields 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.
A survey sample isn’t a map: any home in St.Andrew-Windfields can be high, and a three-month test is the only way to know.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for St.Andrew-Windfields
Alerts for St.Andrew-Windfields 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 St.Andrew-Windfields 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)
How St.Andrew-Windfields’ neighbours compare on hazards
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| St.Andrew-Windfields | Low | $0.043 | 2.7% | Yes |
| Avondale 13,803 · 1.4 km | Low | $0.043 | 2.7% | Yes |
| Bayview Village 22,617 · 1.7 km | Low | $0.043 | 2.7% | Yes |
| East Willowdale 15,514 · 1.9 km | Low | $0.043 | 2.7% | Yes |
| Yonge-Doris 20,298 · 2.5 km | Low | $0.043 | 2.7% | None listed |
| Lansing-Westgate 15,980 · 2.6 km | Low | $0.043 | 2.7% | Yes |
| Willowdale West 17,210 · 3.3 km | Low | $0.043 | 2.7% | Yes |
Avondale (low) has the heaviest fire record of St.Andrew-Windfields’ neighbours, and St.Andrew-Windfields (low) matches or beats it.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what St.Andrew-Windfields faces
Practical steps for St.Andrew-Windfields’ 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
- Wildfire counts one way. Wildfire is read from the national burned-area record around St.Andrew-Windfields’ homes since 1986, a history of fire that may lower Risk but never raises it.
- 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 St.Andrew-Windfields sits in.
- Earthquakes are modelled. NRCan models what earthquakes would cost buildings each year on average, subdivision by subdivision; St.Andrew-Windfields’ figure is its subdivision’s.
- 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 St.Andrew-Windfields floods.
Questions about flooding and hazards in St.Andrew-Windfields
Is radon a problem in St.Andrew-Windfields?
2.7% of the 74 homes Health Canada tested around St.Andrew-Windfields topped the guideline; your own house needs its own test.
How big is the earthquake risk in St.Andrew-Windfields?
About $0.043 a year per $1,000 of building value, NRCan’s long-run expectation for St.Andrew-Windfields.
How is St.Andrew-Windfields’s Hazard risk Grade worked out?
St.Andrew-Windfields’ Hazard risk grade is A−, built on earthquakes and radon with a one-sided wildfire input.
Is St.Andrew-Windfields at risk of wildfire?
Not much by Canadian standards: St.Andrew-Windfields’ band is low, with 0% of the land within 25 km burned since 1986 (last in 2001), so wildfire doesn’t change its grade.
Does St.Andrew-Windfields flood?
St.Andrew-Windfields’ area has been studied for flooding, and the owner’s map shows which streets lie in a zone; the grade leaves flood out.
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).