A flood study covers Leeming: 1 on the national inventory, the newest from Grand River Conservation Authority
The burned-area map is nearly blank around Leeming, 0% within 25 km since 1986, 0.000% a year. Earthquake risk in Leeming is ordinary: NRCan’s model puts building losses at $0.044 a year per $1,000 of value, close to the typical town’s $0.030. Radon is about average around Leeming: 5% of tested homes in the survey area topped the guideline, against 6.6% for the typical town. Leeming grades B+ for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Leeming’s hazards
Four national sources, each read for Leeming: earthquakes, radon, past fires and flood studies.
What Leeming faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Leeming: B+
The grade weighs Leeming’s seismic risk and radon equally, and wildfire is one-sided: a high band counts against a town, a low one earns nothing.
Its place: #494 of 866 in Ontario and #1,255 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.
Few fires near Leeming: 0% within 5 km, 0% within 25 km
Past fire around Leeming’s homes, from the national burned-area record, with the fuel within 5 km.
Fire claims 0.000% of the land around Leeming each year, a low band, with the typical Canadian town at 0.000%.
With 1.3% forest fuel within 5 km and 1.8% within 25 km, the land around Leeming 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
To three decimals the burn rate around Leeming 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.
Most of the country’s 2,610 towns are low-band (92%, against 7.5% above); around Leeming, burning 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.
Grand River Conservation Authority has mapped flooding for Leeming (1 study)
What Canada’s Flood Map Inventory lists for Leeming: who studied flooding and where to see their maps.
One study on the inventory touches Leeming, Grand River Conservation Authority’s from 2018, and its area can be large, so it says a map exists, not that the town floods.
| Study | By | Year | Status |
|---|---|---|---|
| Grand River Regulatory Floodplain | Grand River Conservation Authority | 2018 | final |
Towns with a flood study on file
Leeming is one of the 69% of towns in Ontario with a flood study on file; across Canada it is 58%.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
The grade leaves flood out, since a study area says nothing about how many of Leeming’s homes are at risk.
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.
Earthquakes cost buildings in Leeming $0.044 per $1,000 a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
At $0.044 per $1,000, Leeming’s earthquake risk is about the typical Canadian town’s ($0.030; 1.5 times).
Behind earthquake risk sits data gathered across the city of Hamilton, with Leeming one part of it.
Shaking damage a year per $1,000 of building value
Shaking damage around Leeming runs at $0.044 a year, near the $0.043 of the typical town in Ontario; Alexandria has $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.
More earthquake risk than most: only 32% of Canada’s 2,611 towns are above Leeming.
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 Leeming’s 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).
5% of homes tested around Leeming are over the radon guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline. · Radon tests for the City of Hamilton Health Unit
Around Leeming, 5% of tested homes topped the guideline, near the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Radon runs higher around Leeming than in most towns in Ontario: 5% against 4%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Leeming is in the 5–10% band with 37% of Canada’s 2,611 towns; 26% 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.
The share describes the area, not a house: in Leeming as anywhere, test to be sure.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Leeming
Environment and Climate Change Canada issues the weather alerts for Leeming; 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. |
Smoke and fire warnings for Leeming come through Environment Canada and Alert Ready; the fire map is CWFIS’s.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Leeming
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Leeming | Low | $0.044 | 5% | Yes |
| Shaver 2,882 · 1.0 km | Low | $0.044 | 5% | Yes |
| Spring Valley 4,175 · 1.3 km | Low | $0.044 | 5% | Yes |
| Garner 5,456 · 1.6 km | Low | $0.044 | 5% | None listed |
| Marritt 2,759 · 2.8 km | Low | $0.044 | 5% | None listed |
| Sulphur Springs 9,404 · 3.3 km | Low | $0.044 | 5% | None listed |
| Oakes 4,048 · 3.3 km | Low | $0.044 | 5% | None listed |
Nowhere around Leeming burns more: Shaver, the closest rival, is low to its low.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Leeming faces
What to do about the hazards Leeming 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. Wildfire is read from the national burned-area record around Leeming’s homes since 1986, a history of fire that may lower Risk but never raises it.
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Leeming without grading them.
- 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 Leeming until then.
- Earthquakes are modelled. NRCan models what earthquakes would cost buildings each year on average, subdivision by subdivision; Leeming’s figure is its subdivision’s.
Questions about flooding and hazards in Leeming
Is radon a problem in Leeming?
In Health Canada’s survey, 5% of 100 homes tested in Leeming’s area were above 200 Bq/m³, though only a test tells you about one house.
Is Leeming at risk of wildfire?
Very little by the national record: Leeming’s band is low, with 0% of the land within 25 km burned since 1986, so wildfire doesn’t change its grade.
Does Leeming flood?
A flood study covers Leeming on Canada’s Flood Map Inventory; open the owner’s map to check a street, since flood isn’t graded.
How is Leeming’s Hazard risk Grade worked out?
Leeming grades B+ for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
How big is the earthquake risk in Leeming?
In NRCan’s seismic model, Leeming’s buildings lose $0.044 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).