Photo: Dillan Payne · CC BY-SA 4.0Forest Hill North faces few natural hazards: little fire nearby, low seismic risk, radon over the guideline in 2.7% of tested homes
No wildfire is mapped within 25 km of Forest Hill North’s homes since 1986 (0% of the land, 0.000% a year). Earthquake risk in Forest Hill North 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. Hazard risk gives Forest Hill North a grade of A−, from earthquakes and radon alone.
What stands out about Forest Hill North’s hazards
For Forest Hill North, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Forest Hill North faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Forest Hill North grades A− for hazard risk
Risk averages earthquakes and radon; wildfire joins only where it pulls the average down, so a town like Forest Hill North with little fire nearby would get no credit for it.
Its place: #285 of 866 in Ontario and #700 of 2,589 Canadian towns.
How sure: Earthquake losses are a model’s expectation over many years, not a forecast for any one. 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.
Few fires near Forest Hill North: 0% within 5 km, 0% within 25 km
Fires mapped since 1986 around where Forest Hill North’s residents live, and the fuel next to their homes.
At 0.000% of the land a year, Forest Hill North’s burn rate is in the low band; the typical Canadian town sees 0.000%.
With 0.1% forest fuel within 5 km and 1.1% within 25 km, the land around Forest Hill North gives a fire little to burn.
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
Among the 871 towns in Ontario, Sioux Lookout burns fastest (0.16% a year); Forest Hill North is with the 638 near zero.
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.
The low band holds 92% of Canada’s 2,610 towns, and Forest Hill North sits at its very bottom; only 7.5% are 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.
No flood study is listed for Forest Hill North
Flood studies whose area touches Forest Hill North, from NRCan’s inventory, each linked to its owner.
The inventory has nothing for Forest Hill North, but a local or conservation-authority map may still exist.
Towns with a flood study on file
Missing from a well-mapped province: Forest Hill North 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.
Flood studies don’t enter the grade; they are listed so you can open the official map for Forest Hill North.
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.”
Ordinary seismic risk in Forest Hill North: $0.043 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.
Earthquake losses in Forest Hill North, $0.043 per $1,000, are in line with the typical $0.030 (1.4 times).
Figures for earthquake risk are published for the city of Toronto as a whole, not for Forest Hill North alone.
Shaking damage a year per $1,000 of building value
Earthquake risk around Forest Hill North ($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.
Forest Hill North’s 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).
What a quake does after the shaking, fire, landslides, tsunami, falls outside NRCan’s figure for Forest Hill North.
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 Forest Hill North: 2.7% of area homes over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline. · Source area for radon tests: the City of Toronto Health Unit
Where the typical Canadian town has 6.6% of homes over the guideline, Forest Hill North’s area has fewer, 2.7%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Radon runs lower around Forest Hill North than in most towns in Ontario: 2.7% against 4%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Forest Hill North 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.
Neighbouring homes in Forest Hill North 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 Forest Hill North
Alerts for Forest Hill North 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 Forest Hill North 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 Forest Hill North’s neighbours compare on hazards
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Forest Hill North | Low | $0.043 | 2.7% | None listed |
| Forest Hill South 11,059 · 1.7 km | Low | $0.043 | 2.7% | None listed |
| Englemount-Lawrence 21,455 · 1.7 km | Low | $0.043 | 2.7% | None listed |
| Briar Hill-Belgravia 14,590 · 1.7 km | Low | $0.043 | 2.7% | None listed |
| Humewood-Cedarvale 13,978 · 1.9 km | Low | $0.043 | 2.7% | None listed |
| Lawrence Park South 15,018 · 2.0 km | Low | $0.043 | 2.7% | Yes |
| Yonge-Eglinton 12,424 · 2.1 km | Low | $0.043 | 2.7% | Yes |
Forest Hill South (low) has the heaviest fire record of Forest Hill North’s neighbours, and Forest Hill North (low) matches or beats it.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Forest Hill North faces
What to do about the hazards Forest Hill North 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?
- Ask the municipality for flood maps.
- Are flood and wildfire insured?
What this data can and can’t tell you
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Forest Hill North’s census subdivision (a neighbourhood shows its city’s).
- Radon is a survey. About 14,000 homes were tested across Canada in 2009–2011, and the share over the guideline for Forest Hill North is its health region’s, the survey’s design unit.
- Wildfire counts one way. For Forest Hill North, wildfire means how much nearby land burned in the past forty years, a one-way input that can pull Risk down and nothing more.
- Flood studies aren’t flood zones. NRCan’s inventory says where flood mapping exists, not where water goes; the map’s owner is the authority for Forest Hill North.
Questions about flooding and hazards in Forest Hill North
How big is the earthquake risk in Forest Hill North?
About $0.043 a year per $1,000 of building value, NRCan’s long-run expectation for Forest Hill North.
Does Forest Hill North flood?
Nothing is listed for Forest Hill North on the national inventory (0); local maps may still exist with the municipality.
Is radon a problem in Forest Hill North?
In Health Canada’s survey, 2.7% of 74 homes tested in Forest Hill North’s area were above 200 Bq/m³, though only a test tells you about one house.
How is Forest Hill North’s Hazard risk Grade worked out?
Forest Hill North’s Hazard risk grade is A−, built on earthquakes and radon with a one-sided wildfire input.
Is Forest Hill North at risk of wildfire?
No meaningful wildfire history near Forest Hill North: 0% of nearby land since 1986, band low.
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).