Photo: Chris Woodrich · CC BY-SA 4.0Roseland is on Canada’s flood inventory: 1 listed, led by City of Windsor
Burn scars are few around Roseland, with 0.1% of the land within 25 km touched by fire since 1986 (0.006% a year). For earthquakes Roseland is middling, $0.019 a year per $1,000 against $0.030 for the typical town. More homes than usual carry radon here, 14% over the guideline where the typical town has 6.6%. Roseland grades C+ for hazard risk, with wildfire counted against it.
What stands out about Roseland’s hazards
For Roseland, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Roseland faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Roseland: C+
For Roseland, Risk will be the average of earthquakes and radon, with wildfire added only if it makes the average worse.
Its place: #682 of 866 in Ontario and #1,870 of 2,589 Canadian towns.
How sure: Earthquake losses are a model’s expectation over many years, not a forecast for any one. The burned-area record misses fires under about 10 ha and most grass and farm fires.
Wildfire is rare near Roseland: 0.1% of the land within 25 km burned since 1986, 0.4% within 5 km
Past fire around Roseland’s homes, from the national burned-area record, with the fuel within 5 km.
With 0.006% burned a year, Roseland is among the many low-band places (the typical Canadian town 0.000%).
Little near Roseland’s homes can carry a forest fire; only 0% of the land within 5 km is forest fuel, and 0.4% 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
The land around Roseland burns at 0.006% a year, the 39th highest rate of 871 towns in Ontario; Sioux Lookout tops it 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.
7.5% of Canada’s 2,610 towns burn fast enough to rank moderate or above; Roseland stays low, with 92%.
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.
City of Windsor has mapped flooding for Roseland (1 study)
What Canada’s Flood Map Inventory lists for Roseland: who studied flooding and where to see their maps.
A 2020 study by City of Windsor covers Roseland, and its map, not the inventory, shows the zones.
| Study | By | Year | Status |
|---|---|---|---|
| Little River Watershed Floodplain Mapping | City of Windsor | 2020 | final · not public |
Towns with a flood study on file
69% of towns in Ontario have a flood study, more than Canada’s 58%; Roseland has one too.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Flood is shown here, never graded: a study says where a map exists, not how many of Roseland’s homes stand in a flood zone.
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 Roseland $0.019 per $1,000 a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
At $0.019 per $1,000, Roseland’s earthquake risk is about the typical Canadian town’s ($0.030; 0.6 times).
Shaking damage a year per $1,000 of building value
The typical town in Ontario expects $0.043 a year in shaking damage; Roseland expects less, $0.019, 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.
Toward the quiet end of Canada’s range: 66% of its 2,611 towns sit above Roseland.
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).
For Roseland the model prices shaking damage to buildings, nothing more.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean). · Data for earthquake risk covers the city of Windsor
Radon runs high around Roseland: 14% of tested homes over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline. · Shared with the rest of the Windsor-Essex County Health Unit: radon tests
At 14% over the guideline, the area around Roseland beats the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Radon runs higher around Roseland than in most towns in Ontario: 14% over the guideline (4% is typical), 1% over 600.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
One test in ten or more tops the guideline around Roseland, as in 22% of Canada’s 2,611 towns; 4.6% go higher.
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 low area share in Roseland doesn’t clear a house, nor does a high one condemn it: test.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Where to get warnings in Roseland
Environment and Climate Change Canada issues the weather alerts for Roseland; 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 Roseland 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 Roseland
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Roseland | Low | $0.019 | 14% | Yes |
| Devonshire 9,852 · 2.5 km | Low | $0.019 | 14% | Yes |
| South Windsor 15,896 · 2.9 km | Low | $0.019 | 14% | Yes |
| Remington Park 5,783 · 4.3 km | Low | $0.019 | 14% | None listed |
| South Walkerville 6,129 · 5.3 km | Low | $0.019 | 14% | None listed |
| South Cameron 11,804 · 5.7 km | Low | $0.019 | 14% | None listed |
| Fontainebleau 11,567 · 6.3 km | Low | $0.019 | 14% | Yes |
The fire record around South Cameron is a touch heavier than Roseland’s, but the band is the same: low (here low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Roseland faces
Practical steps for Roseland’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. About 14,000 homes were tested across Canada in 2009–2011, and the share over the guideline for Roseland is its health region’s, the survey’s design unit.
- 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 Roseland.
- Wildfire counts one way. Burned land within 25 km of where people live, averaged over 1986–2025 and checked for fuel near homes, is the measure; it looks back, not ahead, and only ever counts against Roseland.
- Earthquakes are modelled. The earthquake figure is an expected loss, not a forecast, worked out by NRCan for each census subdivision, Roseland’s included.
Questions about flooding and hazards in Roseland
Does Roseland flood?
There is flood mapping for Roseland on the national inventory, each study linked to its owner’s map, none of them graded.
How is Roseland’s Hazard risk Grade worked out?
Hazard risk gives Roseland C+, weighing earthquakes and radon and counting wildfire only against it.
Is Roseland at risk of wildfire?
Not much by Canadian standards: Roseland’s band is low, with 0.1% of the land within 25 km burned since 1986 (last in 2010), so wildfire doesn’t change its grade.
How big is the earthquake risk in Roseland?
In NRCan’s seismic model, Roseland’s buildings lose $0.019 per $1,000 of value in an average year.
Is radon a problem in Roseland?
14% of the 195 homes Health Canada tested around Roseland topped the guideline; your own house needs its own test.
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).