Photo: Andrew Currie from Toronto, Canada · CC BY-SA 2.0Milliken is on Canada’s flood inventory: 1 listed, led by Toronto Regional Conservation Authority
Around Milliken, wildfire is practically absent from the record: 0% within 25 km since 1986, 0.001% a year. Earthquake risk in Milliken is ordinary: NRCan’s model puts building losses at $0.043 a year per $1,000 of value, close to the typical town’s $0.030. In Health Canada’s survey, just 2.7% of homes tested in the area exceeded 200 Bq/m³ (6.6% typical). Milliken grades A− for hazard risk, with wildfire counted against it.
What stands out about Milliken’s hazards
For Milliken, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Milliken faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Milliken: A−
Two inputs always count for Milliken, earthquakes and radon; the third, wildfire, counts only against a town.
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. The burned-area record misses fires under about 10 ha and most grass and farm fires.
Wildfire is rare near Milliken: 0% of the land within 25 km burned since 1986, 0% within 5 km
Past fire around Milliken’s homes, from the national burned-area record, with the fuel within 5 km.
Forty years of fire maps put Milliken at 0.001% a year, low next to the typical Canadian town’s 0.000%.
Milliken’s homes have had no fire within 5 km since 1986; the closest was 10 km away.
Forest fuel is scarce around Milliken: 1% of the land within 5 km, 4.8% 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
Sioux Lookout burns fastest in Ontario at 0.16% a year; Milliken, at 0.001%, ranks 83rd of 871.
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.
Some fire is mapped around Milliken, but not enough to leave the low band, where 92% of Canada’s 2,610 towns are; 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.
A flood study covers Milliken, from Toronto Regional Conservation Authority: 1 on the inventory
What Canada’s Flood Map Inventory lists for Milliken: who studied flooding and where to see their maps.
Toronto Regional Conservation Authority holds the flood mapping that covers Milliken (2021), linked below.
| Study | By | Year | Status |
|---|---|---|---|
| Toronto Floodline Consolidation | Toronto Regional Conservation Authority | 2021 | final |
Towns with a flood study on file
Mapping in Ontario reaches 69% of towns, Milliken included, beside 58% across Canada.
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 Milliken 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 Milliken: $0.043 a year per $1,000
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
Milliken’s $0.043 is close to the typical town’s $0.030 (1.4 times as much).
Milliken shares its earthquake risk numbers with the rest of the city of Toronto.
Shaking damage a year per $1,000 of building value
Earthquake risk around Milliken ($0.043) matches the middle in Ontario ($0.043), far from Alexandria’s $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.
Around half of Canada’s 2,611 towns expect more shaking damage than Milliken (36%).
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 Milliken 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).
Little radon around Milliken: 2.7% of area homes over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline. · Measured across the City of Toronto Health Unit: radon tests
Fewer homes than usual test high around Milliken: 2.7% against 6.6% for the typical Canadian town.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Fewer homes top the guideline around Milliken (2.7%) than in the typical town in Ontario (4%).
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
The quietest radon band, under 5%, holds 37% of Canada’s 2,611 towns and Milliken; 63% sit 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.
Neighbouring homes in Milliken can differ a lot; only a long-term test tells you about yours.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Where to get warnings in Milliken
Alerts for Milliken 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 Milliken 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 Milliken
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Milliken | Low | $0.043 | 2.7% | Yes |
| Agincourt North 27,790 · 1.5 km | Low | $0.043 | 2.7% | Yes |
| Milliken 12,138 · 2.4 km | Low | $0.034 | 0% | Yes |
| Underwood 5,972 · 2.5 km | Low | $0.034 | 0% | None listed |
| Hagerman's Corners 43,555 · 2.7 km | Low | $0.034 | 0% | Yes |
| Vinegar Hill 19,543 · 3.2 km | Low | $0.034 | 0% | Yes |
| East L'Amoreaux 21,533 · 3.3 km | Low | $0.043 | 2.7% | Yes |
Milliken’s low band tops its neighbours; Agincourt North is next (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Milliken faces
What to do about the hazards Milliken 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
- Wildfire counts one way. For Milliken, 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. Radon figures pool the survey’s home tests by area: postal areas once their boundaries arrive, the 2007 health region around Milliken until then.
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Milliken’s census subdivision (a neighbourhood shows its city’s).
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Milliken without grading them.
Questions about flooding and hazards in Milliken
Is radon a problem in Milliken?
Around Milliken, 74 survey homes were tested and 2.7% came in over 200 Bq/m³, a guide to the area, not to any one home.
Does Milliken flood?
A flood study covers Milliken on Canada’s Flood Map Inventory; open the owner’s map to check a street, since flood isn’t graded.
How big is the earthquake risk in Milliken?
In NRCan’s seismic model, Milliken’s buildings lose $0.043 per $1,000 of value in an average year.
How is Milliken’s Hazard risk Grade worked out?
Milliken grades A− for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
Is Milliken at risk of wildfire?
Fire has reached 0% of the land around Milliken since 1986 (last in 2001); at low, it neither helps nor hurts the grade.
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).