Photo: Sikander Iqbal · CC BY-SA 4.0Few places are as safe from hazards as German Mills: it beats 88% of Canadian towns
The burned-area map is nearly blank around German Mills, 0% within 25 km since 1986, 0.001% a year. For earthquakes German Mills is middling, $0.034 a year per $1,000 against $0.030 for the typical town. In Health Canada’s survey, just 0% of homes tested in the area exceeded 200 Bq/m³ (6.6% typical). German Mills grades A for hazard risk, with wildfire counted against it.
What stands out about German Mills’s hazards
Four national sources, each read for German Mills: earthquakes, radon, past fires and flood studies.
What German Mills faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in German Mills: A
The grade weighs German Mills’ seismic risk and radon equally, and wildfire is one-sided: a high band counts against a town, a low one earns nothing.
Its place: #165 of 866 in Ontario and #484 of 2,589 Canadian towns.
How sure: The seismic figure is a long-run average from NRCan’s model, not a prediction. Small fires and grass fires are largely missing from the national burned-area record.
Wildfire is rare near German Mills: 0% of the land within 25 km burned since 1986, 0% within 5 km
Past fire around German Mills’ homes, from the national burned-area record, with the fuel within 5 km.
Next to the typical Canadian town (0.000% a year), German Mills’ 0.001% is in the low band.
The closest burn since 1986 lies 18 km from German Mills’ homes, none within 5 km.
Forest makes up 0.1% of the land within 5 km of German Mills and 4% within 25 km, little for a forest fire to run through.
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; German Mills, 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.
German Mills is in the low band with 92% of Canada’s 2,610 towns; 7.5% sit in moderate or 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.
Toronto Regional Conservation Authority has mapped flooding for German Mills (1 study)
What Canada’s Flood Map Inventory lists for German Mills: who studied flooding and where to see their maps.
Toronto Regional Conservation Authority holds the flood mapping that covers German Mills (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%; German Mills has one too.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Flood mapping is shown for German Mills to be opened and checked, never turned into a grade.
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.
Ordinary seismic risk in German Mills: $0.034 per $1,000 of buildings a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
With $0.034 of shaking damage a year per $1,000, German Mills is about even with the typical $0.030 (1.1 times).
Shaking damage a year per $1,000 of building value
At $0.034, German Mills is below the typical town 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.
Around half of Canada’s 2,611 towns expect more shaking damage than German Mills (46%).
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 German Mills’ 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 Markham, not by town
Little radon around German Mills: 0% of area homes over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
Fewer homes than usual test high around German Mills: 0% against 6.6% for the typical Canadian town.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Fewer homes top the guideline around German Mills (0%) 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.
German Mills is in the lowest band, with 37% of Canada’s 2,611 towns: under 5% of tests over the guideline, while 63% have more.
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 German Mills 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). · Data for radon tests covers the York Regional Health Unit
Weather and fire alerts for German Mills
Alerts for German Mills 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 German Mills 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)
How German Mills’ neighbours compare on hazards
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| German Mills | Low | $0.034 | 0% | Yes |
| Thornlea 20,872 · 2.0 km | Low | $0.034 | 0% | Yes |
| Hillcrest Village 16,374 · 2.2 km | Low | $0.043 | 2.7% | Yes |
| Bayview Woods-Steeles 12,499 · 3.2 km | Low | $0.043 | 2.7% | Yes |
| Steeles 22,943 · 3.7 km | Low | $0.043 | 2.7% | Yes |
| Steeles Corners 9,468 · 4.1 km | Low | $0.034 | 0% | Yes |
| Langstaff 8,147 · 4.2 km | Low | $0.034 | 0% | Yes |
Thornlea (low) has the heaviest fire record of German Mills’ neighbours, and German Mills (low) matches or beats it.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what German Mills faces
What to do about the hazards German Mills 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
- 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 German Mills sits in.
- 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 German Mills floods.
- Wildfire counts one way. The wildfire figure is the share of land within 25 km of German Mills’ 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 German Mills’.
Questions about flooding and hazards in German Mills
How is German Mills’s Hazard risk Grade worked out?
Hazard risk gives German Mills A, weighing earthquakes and radon and counting wildfire only against it.
Is German Mills at risk of wildfire?
Less than most of Canada: 0% of the land within 25 km of German Mills has burned since 1986, the last in 2001, a low band that leaves Risk alone.
How big is the earthquake risk in German Mills?
In NRCan’s seismic model, German Mills’ buildings lose $0.034 per $1,000 of value in an average year.
Is radon a problem in German Mills?
In Health Canada’s survey, 0% of 95 homes tested in German Mills’ area were above 200 Bq/m³, though only a test tells you about one house.
Does German Mills flood?
German Mills’ 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).