Photo: Jodie Wilson from Mountain View, USA · CC BY 2.0A flood study covers Douro-Dummer: 4 on the national inventory, the newest from Ontonabee Region Conservation Authority
Fire has left almost no mark near Douro-Dummer: 0% of the land within 25 km since 1986, 0.000% a year. Shaking is about as much of a worry in Douro-Dummer as in most places, at $0.030 a year per $1,000 of building value ($0.030 typical). Douro-Dummer’s survey area, 8.9% over the radon guideline, is close to the typical town’s 6.6%. Douro-Dummer grades B− for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Douro-Dummer’s hazards
Four national sources, each read for Douro-Dummer: earthquakes, radon, past fires and flood studies.
What Douro-Dummer faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Douro-Dummer grades B− for hazard risk
Risk averages earthquakes and radon; wildfire joins only where it pulls the average down, so a town like Douro-Dummer with little fire nearby would get no credit for it.
Its place: #658 of 866 in Ontario and #1,615 of 2,589 Canadian towns.
How sure: Earthquake losses are a model’s expectation over many years, not a forecast for any one. Small fires and grass fires are largely missing from the national burned-area record.
Little of the land around Douro-Dummer has burned: 0% within 5 km, 0% within 25 km since 1986
Fires mapped since 1986 around where Douro-Dummer’s residents live, and the fuel next to their homes.
Fire claims 0.000% of the land around Douro-Dummer each year, a low band, with the typical Canadian town at 0.000%.
22% of the land within 5 km of Douro-Dummer is forest fuel, close to the 18% 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
Of the 871 towns in Ontario, 638 have a burn rate that rounds to zero, Douro-Dummer among them; Sioux Lookout leads at 0.16% a year.
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; Douro-Dummer 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.
Douro-Dummer is on the flood map inventory: 4 studies, latest by Ontonabee Region Conservation Authority
Flood studies whose area touches Douro-Dummer, from NRCan’s inventory, each linked to its owner.
Ontonabee Region Conservation Authority and others have studied flooding in areas that include Douro-Dummer: 4 studies, the latest from 1991.
| Study | By | Year | Status |
|---|---|---|---|
| Peterborough | Ontonabee Region Conservation Authority | 1991 | final · not public |
| Indian River | Ontonabee Region Conservation Authority | 1983 | final · not public |
| Lakefield West | Ontonabee Region Conservation Authority | 1981 | final · not public |
| Ouse River | Ontonabee Region Conservation Authority | 1976 | final · not public |
Towns with a flood study on file
Mapping in Ontario reaches 69% of towns, Douro-Dummer 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.
Mapping around Douro-Dummer began in the 1970s; the 1980s saw the most work (2 of 4 studies), the latest in the 1990s.
Study dates as the NRCan inventory lists them, one count per study touching Douro-Dummer.
Nothing here counts toward Risk; the studies are pointers to the maps their owners keep for Douro-Dummer.
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 Douro-Dummer: $0.030 a year per $1,000
NRCan’s seismic risk model: the damage shaking is expected to do to buildings each year, on average over many years.
With $0.030 of shaking damage a year per $1,000, Douro-Dummer sits right at the typical $0.030.
Shaking damage a year per $1,000 of building value
The typical town in Ontario expects $0.043 a year in shaking damage; Douro-Dummer expects less, $0.030, 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.
Middle of the pack: 48% of Canada’s 2,611 towns have more earthquake risk than Douro-Dummer.
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 Douro-Dummer’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).
Some radon around Douro-Dummer: 8.9% of area homes over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline.
Near the middle for radon: Douro-Dummer’s area 8.9%, the typical Canadian town 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
More homes top the guideline around Douro-Dummer (8.9%) than in the typical town in Ontario (4%); 0.9% went over 600.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
A middling share of high tests puts Douro-Dummer with 37% of Canada’s 2,611 towns, below 26% of them.
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.
One home in Douro-Dummer can be high while next door is low; a three-month test settles it.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Data for radon tests covers the Peterborough County-City Health Unit
Weather and fire alerts for Douro-Dummer
Environment and Climate Change Canada issues the weather alerts for Douro-Dummer; 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. |
In fire season, check CWFIS for danger and active fires around Douro-Dummer, and listen to local authorities for orders.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
How Douro-Dummer’s neighbours compare on hazards
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Douro-Dummer | Low | $0.030 | 8.9% | Yes |
| Bridgenorth 20,628 · 16 km | Low | $0.026 | 8.9% | Yes |
| Norwood 5,308 · 16 km | Low | $0.029 | 8.9% | Yes |
| Curve Lake First Nation 35 1,428 · 17 km | Low | $0.019 | 8.9% | None listed |
| Peterborough 97,834 · 18 km | Low | $0.025 | 8.9% | Yes |
Nowhere around Douro-Dummer burns more: Bridgenorth, the closest rival, is low to its low.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Douro-Dummer faces
What to do about the hazards Douro-Dummer 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.
- 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 Douro-Dummer’s homes burned each year from 1986 to 2025, past fire rather than a forecast, and it can only lower Risk.
- 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 Douro-Dummer’s.
- Flood studies aren’t flood zones. The flood inventory points to maps; it is incomplete and not the official source, so ask the municipality about any street in Douro-Dummer.
- Radon is a survey. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Douro-Dummer takes its 2007 health region’s share.
Questions about flooding and hazards in Douro-Dummer
How is Douro-Dummer’s Hazard risk Grade worked out?
Douro-Dummer grades B− for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
Is Douro-Dummer at risk of wildfire?
No meaningful wildfire history near Douro-Dummer: 0% of nearby land since 1986, band low.
Is radon a problem in Douro-Dummer?
In Health Canada’s survey, 8.9% of 112 homes tested in Douro-Dummer’s area were above 200 Bq/m³, though only a test tells you about one house.
How big is the earthquake risk in Douro-Dummer?
About $0.030 a year per $1,000 of building value, NRCan’s long-run expectation for Douro-Dummer.
Does Douro-Dummer flood?
The inventory lists a study touching Douro-Dummer; whether a given street floods is on that map, not in 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).