Photo: Earth Science and Remote Sensing Unit , Lyndon B. Johnson Space Center · Public domainA flood study covers Corkery: 1 on the national inventory, the newest from Mississippi Valley Conservation Authority
Little of the land around Corkery has burned: 0.1% within 25 km since 1986, or 0.002% a year. Seismic risk runs high: $0.15 of expected damage per $1,000 of buildings a year, the typical town $0.030. In Health Canada’s survey, 6.2% of homes tested in Corkery’s area exceeded 200 Bq/m³, close to the typical 6.6%. Corkery grades C+ for hazard risk, with wildfire counted against it.
What stands out about Corkery’s hazards
Four national sources, each read for Corkery: earthquakes, radon, past fires and flood studies.
What Corkery faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Corkery: C+
The grade weighs Corkery’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: #703 of 866 in Ontario and #1,894 of 2,589 Canadian towns.
How sure: Earthquake losses are a model’s expectation over many years, not a forecast for any one. Only 64 homes were tested in the survey area, so the radon share is rough. Small fires and grass fires are largely missing from the national burned-area record.
Little of the land around Corkery has burned: 0.6% within 5 km, 0.1% within 25 km since 1986
Past fire around Corkery’s homes, from the national burned-area record, with the fuel within 5 km.
Next to the typical Canadian town (0.000% a year), Corkery’s 0.002% is in the low band.
The ring nearest Corkery is the most wooded: 32% forest fuel within 5 km against 17% 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
In the top quarter in Ontario: Corkery ranks 54th of 871 at 0.002% a year, with Sioux Lookout first at 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.
Low, like 92% of the country’s 2,610 towns: the land around Corkery burns, but slower than in the 7.5% 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.
Mississippi Valley Conservation Authority has mapped flooding for Corkery (1 study)
What Canada’s Flood Map Inventory lists for Corkery: who studied flooding and where to see their maps.
Mississippi Valley Conservation Authority holds the flood mapping that covers Corkery (2019), linked below.
| Study | By | Year | Status |
|---|---|---|---|
| Lower Mississippi River Flood Plain Mapping Study | Mississippi Valley Conservation Authority | 2019 | final · not public |
Towns with a flood study on file
Corkery 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.
Flood mapping is shown for Corkery 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.
Shaking is Corkery’s costliest hazard: $0.15 a year per $1,000
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
The typical town loses $0.030 a year to shaking; Corkery loses $0.15, 5 times as much.
For earthquake risk, the only official count covers all of the city of Ottawa, Corkery included.
Shaking damage a year per $1,000 of building value
Earthquake risk in Ontario peaks in Alexandria ($0.21); Corkery, at $0.15, sits above the median of $0.043.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
Corkery sits above most of Canada’s 2,611 towns on earthquake risk; 15% 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 model counts damage to Corkery’s buildings and their occupants from shaking only: not liquefaction, landslides, tsunami or fires after a quake.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
Radon about average around Corkery: 6.2% over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline. · Measured across the City of Ottawa Health Unit: radon tests
Corkery’s area, at 6.2%, is close to the 6.6% of the typical Canadian town.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
The median in Ontario is 4% over 200 Bq/m³; the survey area around Corkery has 6.2%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
26% of Canada’s 2,611 towns have more homes over 200 Bq/m³ than Corkery’s 5–10% band, which holds 37%.
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 Corkery; it can’t tell you your basement’s level.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Corkery
Alerts for Corkery 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 Corkery 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)
Hazards in the places around Corkery
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Corkery | Low | $0.15 | 6.2% | Yes |
| Carp 5,621 · 9.5 km | Low | $0.15 | 6.2% | None listed |
| Almonte 16,073 · 10 km | Low | $0.11 | 19% | Yes |
| Stittsville North 13,331 · 12 km | Low | $0.15 | 6.2% | None listed |
| Stittsville 19,753 · 13 km | Low | $0.15 | 6.2% | None listed |
| Kanata Lakes 19,861 · 13 km | Low | $0.15 | 6.2% | None listed |
| Brookside - Briarbrook - Morgans Grant 15,509 · 15 km | Low | $0.15 | 6.2% | None listed |
None of the places around has more fire nearby than Corkery (low); Carp comes closest (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Corkery faces
What to do about the hazards Corkery 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.
- Drop, cover and hold on.
- Strap the water heater down.
- Keep 72 hours of supplies.
- Has it had a radon test?
- Check the address on the flood map.
- Are flood and wildfire insured?
- Is earthquake cover included?
What this data can and can’t tell you
- Earthquakes are modelled. NRCan models what earthquakes would cost buildings each year on average, subdivision by subdivision; Corkery’s figure is its subdivision’s.
- Wildfire counts one way. Wildfire is read from the national burned-area record around Corkery’s homes since 1986, a history of fire that may lower Risk but never raises it.
- 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 Corkery.
- Radon is a survey. About 14,000 homes were tested across Canada in 2009–2011, and the share over the guideline for Corkery is its health region’s, the survey’s design unit.
Questions about flooding and hazards in Corkery
Does Corkery flood?
There is flood mapping for Corkery on the national inventory, each study linked to its owner’s map, none of them graded.
How is Corkery’s Hazard risk Grade worked out?
Hazard risk gives Corkery C+, weighing earthquakes and radon and counting wildfire only against it.
How big is the earthquake risk in Corkery?
In NRCan’s seismic model, Corkery’s buildings lose $0.15 per $1,000 of value in an average year.
Is radon a problem in Corkery?
Around Corkery, 64 survey homes were tested and 6.2% came in over 200 Bq/m³, a guide to the area, not to any one home.
Is Corkery at risk of wildfire?
Fire has reached 0.1% of the land around Corkery since 1986 (last in 2020); at low, it neither helps nor hurts the grade.
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).