Flood mapping exists for Rosemount: 1 on record, latest by Grand River Conservation Authority
The burned-area map is nearly blank around Rosemount, 0% within 25 km since 1986, 0.000% a year. NRCan expects $0.022 of shaking damage a year per $1,000 of buildings in Rosemount, near the typical $0.030. In Health Canada’s survey, just 4% of homes tested in the area exceeded 200 Bq/m³ (6.6% typical). Hazard risk gives Rosemount a grade of A−, from earthquakes and radon alone.
What stands out about Rosemount’s hazards
For Rosemount, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Rosemount faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Rosemount: A−
Seismic risk and radon set Rosemount’s grade, wildfire can drag it down, and flood mapping stays out of it.
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. The burned-area record misses fires under about 10 ha and most grass and farm fires.
Wildfire is rare near Rosemount: 0% of the land within 25 km burned since 1986, 0% within 5 km
Fires mapped since 1986 around where Rosemount’s residents live, and the fuel next to their homes.
The land within 25 km of Rosemount burns at 0.000% a year on average, the low band; the typical Canadian town: 0.000%.
Little near Rosemount’s homes can carry a forest fire; only 2.1% of the land within 5 km is forest fuel, and 4% 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
Little or nothing burns around Rosemount in a typical year; 638 of the 871 towns in Ontario share that, and Sioux Lookout leads 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.
92% of Canada’s 2,610 towns are in the low band and 7.5% above it; Rosemount is among the many where the yearly burn rate 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.
Rosemount is on the flood map inventory: 1 study, by Grand River Conservation Authority
Flood studies whose area touches Rosemount, from NRCan’s inventory, each linked to its owner.
Grand River Conservation Authority holds the flood mapping that covers Rosemount (2018), linked below.
| Study | By | Year | Status |
|---|---|---|---|
| Grand River Regulatory Floodplain | Grand River Conservation Authority | 2018 | final |
Towns with a flood study on file
Its flood study puts Rosemount with 69% of towns in Ontario; Canada’s share is 58%.
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 Rosemount.
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.
Ordinary seismic risk in Rosemount: $0.022 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.
Rosemount’s $0.022 is close to the typical town’s $0.030 (0.7 times as much).
For earthquake risk, the only official count covers all of the city of Kitchener, Rosemount included.
Shaking damage a year per $1,000 of building value
The typical town in Ontario expects $0.043 a year in shaking damage; Rosemount expects less, $0.022, and Alexandria the most, $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.
Around half of Canada’s 2,611 towns expect more shaking damage than Rosemount (61%).
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 Rosemount.
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 Rosemount are over the radon guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline.
At 4% over the guideline, the area around Rosemount is under the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
The typical town in Ontario has 4% over 200 Bq/m³; Rosemount’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.
63% of Canada’s 2,611 towns have a higher share of homes over 200 Bq/m³ than Rosemount’s 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.
Health Canada advises testing every home, Rosemount’s included, whatever the area’s figure.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Radon tests published for the Waterloo Health Unit, not by town
Where to get warnings in Rosemount
Alerts for Rosemount 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. |
Evacuation orders for Rosemount come from the municipality or the province, while CWFIS maps fire danger every day.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Rosemount
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Rosemount | Low | $0.022 | 4% | Yes |
| Heritage Park 6,369 · 1.0 km | Low | $0.022 | 4% | Yes |
| Grand River North 3,823 · 1.7 km | Low | $0.022 | 4% | Yes |
| Auditorium 3,918 · 1.7 km | Low | $0.022 | 4% | Yes |
| Stanley Park 8,721 · 1.8 km | Low | $0.022 | 4% | Yes |
| Central Frederick 5,895 · 1.8 km | Low | $0.022 | 4% | Yes |
| Bridgeport East 3,903 · 2.1 km | Low | $0.022 | 4% | Yes |
The neighbour with the most fire is Heritage Park (low), still no more than Rosemount (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Rosemount faces
Practical steps for Rosemount’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. For Rosemount, wildfire means how much nearby land burned in the past forty years, a one-way input that can pull Risk down and nothing more.
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Rosemount’s census subdivision (a neighbourhood shows its city’s).
- 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 Rosemount until then.
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Rosemount without grading them.
Questions about flooding and hazards in Rosemount
How is Rosemount’s Hazard risk Grade worked out?
Hazard risk gives Rosemount A−, weighing earthquakes and radon and counting wildfire only against it.
Does Rosemount flood?
A flood study covers Rosemount 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 Rosemount?
The area’s survey found 4% of 101 tested homes above Health Canada’s guideline, so a three-month test is worth doing in Rosemount.
How big is the earthquake risk in Rosemount?
Expected earthquake damage in Rosemount comes to $0.022 a year for each $1,000 that buildings are worth.
Is Rosemount at risk of wildfire?
Hardly at all on record: 0% of the land within 25 km of Rosemount since 1986, a low band, though small grass fires aren’t mapped.
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).