Few places are as safe from hazards as Lisgar: it beats 86% of Canadian towns
Fire has left almost no mark near Lisgar: 0% of the land within 25 km since 1986, 0.000% a year. Earthquake risk in Lisgar is ordinary: NRCan’s model puts building losses at $0.040 a year per $1,000 of value, close to the typical town’s $0.030. In Health Canada’s survey, just 0% of homes tested in the area exceeded 200 Bq/m³ (6.6% typical). Lisgar grades A for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Lisgar’s hazards
Four national sources, each read for Lisgar: earthquakes, radon, past fires and flood studies.
What Lisgar faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Lisgar: A
Earthquake risk and radon make Lisgar’s grade; wildfire can only lower it, never raise it, and flood studies are listed but not scored.
Its place: #194 of 866 in Ontario and #529 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 Lisgar: 0% within 5 km, 0% within 25 km
Past fire around Lisgar’s homes, from the national burned-area record, with the fuel within 5 km.
The yearly burn rate around Lisgar is 0.000%, low beside 0.000% for the typical Canadian town.
Little near Lisgar’s homes can carry a forest fire; only 0.3% of the land within 5 km is forest fuel, and 2.8% 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 has the highest burn rate in Ontario, 0.16% a year; around Lisgar, as around 638 of the 871 towns, it rounds to 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.
Measured against 2,610 towns, Lisgar is in the largest group, low (92%), and at its floor, while 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 Lisgar, from Conservation Halton: 1 on the inventory
What Canada’s Flood Map Inventory lists for Lisgar: who studied flooding and where to see their maps.
Conservation Halton holds the flood mapping that covers Lisgar (2020), linked below.
| Study | By | Year | Status |
|---|---|---|---|
| Halton Shoreline Flood Hazard | Conservation Halton | 2020 | final · not public |
Towns with a flood study on file
Mapping in Ontario reaches 69% of towns, Lisgar 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.
Flood mapping is shown for Lisgar 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.
Earthquakes cost buildings in Lisgar $0.040 per $1,000 a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
1.3 times the typical $0.030: Lisgar’s $0.040 is ordinary.
Shaking damage a year per $1,000 of building value
Typical for its province: Lisgar at $0.040 beside a median in Ontario of $0.043, with Alexandria on top 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.
Lisgar’s earthquake risk lands near the centre of Canada’s range; 43% 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).
The loss is to Lisgar’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). · Earthquake risk: one figure for all of the city of Mississauga
0% of homes tested around Lisgar are over the radon guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
Radon runs below the typical Canadian town (6.6%) in Lisgar’s area, at 0%. Lisgar shares its radon tests numbers with the rest of the Peel Regional Health Unit.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Lisgar’s area, at 0%, 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.
Under 5% puts Lisgar with 37% of Canada’s 2,611 towns; 63% have more high tests.
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.
Basements, soil and how a house is sealed decide its radon, so in Lisgar only a test can say.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Lisgar
Alerts for Lisgar 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 Lisgar 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 Lisgar’s neighbours compare on hazards
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Lisgar | Low | $0.040 | 0% | Yes |
| Meadowvale 37,821 · 1.8 km | Low | $0.040 | 0% | Yes |
| Churchill Meadows 48,872 · 3.6 km | Low | $0.040 | 0% | Yes |
| Streetsville 13,535 · 4.6 km | Low | $0.040 | 0% | Yes |
| Central Erin Mills 36,393 · 4.8 km | Low | $0.040 | 0% | Yes |
| Barbertown 9,209 · 5.9 km | Low | $0.040 | 0% | Yes |
| Roseborough 54,539 · 6.9 km | Low | $0.040 | 0% | Yes |
Fire is no heavier anywhere nearby than around Lisgar (low), with Meadowvale next at low.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Lisgar faces
Practical steps for Lisgar’s 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?
- 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. The wildfire figure is the share of land within 25 km of Lisgar’s homes burned each year from 1986 to 2025, past fire rather than a forecast, and it can only lower Risk.
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Lisgar 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 Lisgar until then.
- 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 Lisgar’s.
Questions about flooding and hazards in Lisgar
Is Lisgar at risk of wildfire?
Hardly at all on record: 0% of the land within 25 km of Lisgar since 1986, a low band, though small grass fires aren’t mapped.
Does Lisgar flood?
A flood study covers Lisgar on Canada’s Flood Map Inventory; open the owner’s map to check a street, since flood isn’t graded.
Is radon a problem in Lisgar?
0% of the 90 homes Health Canada tested around Lisgar topped the guideline; your own house needs its own test.
How big is the earthquake risk in Lisgar?
In NRCan’s seismic model, Lisgar’s buildings lose $0.040 per $1,000 of value in an average year.
How is Lisgar’s Hazard risk Grade worked out?
Hazard risk gives Lisgar A, weighing earthquakes and radon and counting wildfire only against it.
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).