Photo: JFVoll · CC BY-SA 3.0Flood mapping exists for City Commercial Core: 1 on record, latest by Grand River Conservation Authority
The national fire record shows next to nothing around City Commercial Core, 0% of the land within 25 km since 1986 (0.000% a year). For earthquakes City Commercial Core is middling, $0.022 a year per $1,000 against $0.030 for the typical town. Radon is lower than usual: 4% of tested homes in the survey area topped the guideline, against 6.6% for the typical town. City Commercial Core grades A− for hazard risk; wildfire is low here, so it earns no credit.
What stands out about City Commercial Core’s hazards
Four national sources, each read for City Commercial Core: earthquakes, radon, past fires and flood studies.
What City Commercial Core faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
City Commercial Core grades A− for hazard risk
For City Commercial Core, Risk will be the average of earthquakes and radon, with wildfire added only if it makes the average worse.
Its place: #237 of 866 in Ontario and #594 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.
Little of the land around City Commercial Core has burned: 0% within 5 km, 0% within 25 km since 1986
Past fire around City Commercial Core’s homes, from the national burned-area record, with the fuel within 5 km.
A burn rate of 0.000% a year keeps City Commercial Core in the low band (the typical Canadian town: 0.000%).
Little near City Commercial Core’s homes can carry a forest fire; only 0.8% of the land within 5 km is forest fuel, and 3.3% 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 City Commercial Core, 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.
Most of the country’s 2,610 towns are low-band (92%, against 7.5% above); around City Commercial Core, 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.
A flood study covers City Commercial Core, from Grand River Conservation Authority: 1 on the inventory
What Canada’s Flood Map Inventory lists for City Commercial Core: who studied flooding and where to see their maps.
A 2018 study by Grand River Conservation Authority covers City Commercial Core, and its map, not the inventory, shows the zones.
| Study | By | Year | Status |
|---|---|---|---|
| Grand River Regulatory Floodplain | Grand River Conservation Authority | 2018 | final |
Towns with a flood study on file
City Commercial Core 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.
Nothing here counts toward Risk; the studies are pointers to the maps their owners keep for City Commercial Core.
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.
Expected shaking damage in City Commercial Core: $0.022 a year per $1,000
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
City Commercial Core’s $0.022 is close to the typical town’s $0.030 (0.7 times as much).
Nobody publishes earthquake risk for City Commercial Core alone, so this card uses the figure for the city of Kitchener.
Shaking damage a year per $1,000 of building value
Earthquake risk in Ontario peaks in Alexandria ($0.21); City Commercial Core, at $0.022, is below 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.
City Commercial Core sits mid-range among Canada’s 2,611 towns: 61% expect more shaking damage.
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 City Commercial Core’s 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).
4% of homes tested around City Commercial Core are over the radon guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
A lower share than most: 4% of tested homes around City Commercial Core, the typical Canadian town 6.6%. Figures for radon tests are published for the Waterloo Health Unit as a whole, not for City Commercial Core alone.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
The typical town in Ontario has 4% over 200 Bq/m³; City Commercial Core’s area has 4%, much the same.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Few tests over the guideline: City Commercial Core 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.
A survey sample isn’t a map: any home in City Commercial Core can be high, and a three-month test is the only way to know.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for City Commercial Core
Environment and Climate Change Canada issues the weather alerts for City Commercial Core; 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. |
For fires near City Commercial Core, the national fire information system maps danger and active fires daily; local authorities give any evacuation order.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
How City Commercial Core’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 |
|---|---|---|---|---|
| City Commercial Core | Low | $0.022 | 4% | Yes |
| Cedar Hill 3,190 · 0.6 km | Low | $0.022 | 4% | Yes |
| Central Frederick 5,895 · 0.8 km | Low | $0.022 | 4% | Yes |
| Mill Courtland Woodside Park 3,319 · 0.9 km | Low | $0.022 | 4% | Yes |
| Auditorium 3,918 · 1.0 km | Low | $0.022 | 4% | Yes |
| Victoria Park 3,574 · 1.1 km | Low | $0.022 | 4% | Yes |
| Mt. Hope Huron Park 5,174 · 1.3 km | Low | $0.022 | 4% | Yes |
Cedar Hill (low) has the heaviest fire record of City Commercial Core’s neighbours, and City Commercial Core (low) matches or beats it.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what City Commercial Core faces
Practical steps for City Commercial Core’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
- 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 City Commercial Core sits in.
- 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 City Commercial Core floods.
- Earthquakes are modelled. NRCan models what earthquakes would cost buildings each year on average, subdivision by subdivision; City Commercial Core’s figure is its subdivision’s.
- Wildfire counts one way. Wildfire is read from the national burned-area record around City Commercial Core’s homes since 1986, a history of fire that may lower Risk but never raises it.
Questions about flooding and hazards in City Commercial Core
Does City Commercial Core flood?
City Commercial Core’s area has been studied for flooding, and the owner’s map shows which streets lie in a zone; the grade leaves flood out.
Is City Commercial Core at risk of wildfire?
Hardly at all on record: 0% of the land within 25 km of City Commercial Core since 1986, a low band, though small grass fires aren’t mapped.
How is City Commercial Core’s Hazard risk Grade worked out?
Hazard risk gives City Commercial Core A−, weighing earthquakes and radon and counting wildfire only against it.
Is radon a problem in City Commercial Core?
4% of the 101 homes Health Canada tested around City Commercial Core topped the guideline; your own house needs its own test.
How big is the earthquake risk in City Commercial Core?
NRCan’s model expects shaking to cost buildings in City Commercial Core $0.022 a year for every $1,000 of their value, on average over many years.
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).