Photo: Dillan Payne · CC BY-SA 4.0Hazards in Blake-Jones are mild: low wildfire and earthquake risk, and 2.7% of area homes above the radon guideline
Wildfire barely registers for Blake-Jones, at 0% of the land within 25 km since 1986 (0.000% a year). For earthquakes Blake-Jones is middling, $0.043 a year per $1,000 against $0.030 for the typical town. Blake-Jones grades A− for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Blake-Jones’s hazards
Four national sources, each read for Blake-Jones: earthquakes, radon, past fires and flood studies.
What Blake-Jones faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Blake-Jones grades A− for hazard risk
Seismic risk and radon set Blake-Jones’ grade, wildfire can drag it down, and flood mapping stays out of it.
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. The radon share rests on 74 home tests in the survey area, so a few homes move it. Small fires and grass fires are largely missing from the national burned-area record.
Little of the land around Blake-Jones has burned: 0% within 5 km, 0% within 25 km since 1986
Past fire around Blake-Jones’ homes, from the national burned-area record, with the fuel within 5 km.
The yearly burn rate around Blake-Jones is 0.000%, low beside 0.000% for the typical Canadian town.
Land that isn’t forest covers nearly all the ground around Blake-Jones: forest fuel is 0.7% within 5 km and 1.1% 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
To three decimals the burn rate around Blake-Jones is zero, as for 638 of the 871 towns in Ontario, while Sioux Lookout reaches 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.
92% of Canada’s 2,610 towns are in the low band and 7.5% above it; Blake-Jones is among the many where the yearly burn rate rounds to zero.
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.
The flood map inventory lists nothing for Blake-Jones
What Canada’s Flood Map Inventory lists for Blake-Jones: who studied flooding and where to see their maps.
An empty entry for Blake-Jones on the inventory isn’t proof of safety; ask locally for flood maps.
Towns with a flood study on file
Missing from a well-mapped province: Blake-Jones has no study, where 69% of towns in Ontario have one against 58% nationally.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Nothing here counts toward Risk; the studies are pointers to the maps their owners keep for Blake-Jones.
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.”
Expected shaking damage in Blake-Jones: $0.043 a year per $1,000
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
At $0.043 per $1,000, Blake-Jones’ earthquake risk is about the typical Canadian town’s ($0.030; 1.4 times).
Shaking damage a year per $1,000 of building value
Neither high nor low in Ontario: Blake-Jones’ $0.043 sits by the median of $0.043, while Alexandria reaches $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.
Middle of the pack: 36% of Canada’s 2,611 towns have more earthquake risk than Blake-Jones.
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 Blake-Jones’ 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). · Earthquake risk: one figure for all of the city of Toronto
Little radon around Blake-Jones: 2.7% of area homes over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
Where the typical Canadian town has 6.6% of homes over the guideline, Blake-Jones’ area has fewer, 2.7%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Blake-Jones’ area, at 2.7%, is below the median in Ontario (4%).
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Few tests over the guideline: Blake-Jones shares the bottom band with 37% of Canada’s 2,611 towns, below the other 63%.
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.
The survey sampled homes around Blake-Jones; it can’t tell you your basement’s level.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Area behind the radon tests figures: the City of Toronto Health Unit
Weather and fire alerts for Blake-Jones
Environment and Climate Change Canada issues the weather alerts for Blake-Jones; Alert Ready carries the urgent ones to phones, radio and TV.
| 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. |
In fire season, check CWFIS for danger and active fires around Blake-Jones, and listen to local authorities for orders.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Blake-Jones
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Blake-Jones | Low | $0.043 | 2.7% | None listed |
| North Riverdale 11,491 · 0.9 km | Low | $0.043 | 2.7% | Yes |
| South Riverdale 28,264 · 1.2 km | Low | $0.043 | 2.7% | Yes |
| Greenwood-Coxwell 14,146 · 1.2 km | Low | $0.043 | 2.7% | Yes |
| Danforth 9,364 · 1.4 km | Low | $0.043 | 2.7% | None listed |
| Playter Estates-Danforth 7,712 · 1.4 km | Low | $0.043 | 2.7% | Yes |
| Danforth East York 17,073 · 1.6 km | Low | $0.043 | 2.7% | Yes |
The fire record around Danforth is a touch heavier than Blake-Jones’, but the band is the same: low (here low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Blake-Jones faces
Practical steps for Blake-Jones’ 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. 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 Blake-Jones floods.
- Wildfire counts one way. Wildfire is read from the national burned-area record around Blake-Jones’ 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 Blake-Jones sits in.
- Earthquakes are modelled. NRCan models what earthquakes would cost buildings each year on average, subdivision by subdivision; Blake-Jones’ figure is its subdivision’s.
Questions about flooding and hazards in Blake-Jones
Does Blake-Jones flood?
The inventory has 0 studies for Blake-Jones, and an empty list isn’t a clean bill: the municipality holds any flood maps.
Is radon a problem in Blake-Jones?
The area’s survey found 2.7% of 74 tested homes above Health Canada’s guideline, so a three-month test is worth doing in Blake-Jones.
Is Blake-Jones at risk of wildfire?
Very little by the national record: Blake-Jones’ band is low, with 0% of the land within 25 km burned since 1986, so wildfire doesn’t change its grade.
How is Blake-Jones’s Hazard risk Grade worked out?
Blake-Jones’ Hazard risk grade is A−, built on earthquakes and radon with a one-sided wildfire input.
How big is the earthquake risk in Blake-Jones?
In NRCan’s seismic model, Blake-Jones’ buildings lose $0.043 per $1,000 of value in an average year.
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).