Photo: Dennis G. Jarvis · CC BY-SA 2.0Flood mapping exists for Portland Estates: 1 on record, latest by Halifax Regional Municipality
Wildfire is a moderate presence around Portland Estates: 2.5% of the land within 25 km has burned since 1986, 0.06% a year, short of the band that counts against Risk. Earthquake risk in Portland Estates is ordinary: NRCan’s model puts building losses at $0.018 a year per $1,000 of value, close to the typical town’s $0.030. More homes than usual carry radon here, 13% over the guideline where the typical town has 6.6%. Portland Estates grades B− for hazard risk, with wildfire counted against it.
What stands out about Portland Estates’s hazards
For Portland Estates, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Portland Estates faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Portland Estates: B−
For Portland Estates, Risk will be the average of earthquakes and radon, with wildfire added only if it makes the average worse.
Its place: #47 of 88 in Nova Scotia and #1,724 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.
Fire reaches the land around Portland Estates: 0.9% within 5 km, 2.5% within 25 km
Fires mapped since 1986 around where Portland Estates’ residents live, and the fuel next to their homes.
Moderate: the land around Portland Estates burns at 0.06% a year, where the typical Canadian town sees 0.000%.
Forest fuel covers 34% of the land close to Portland Estates and 71% across 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 Nova Scotia · highest of 90
Barrington burns fastest in Nova Scotia at 0.46% a year; Portland Estates, at 0.06%, ranks 10th of 90.
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.
Portland Estates is in the moderate band, which holds 5.4% of Canada’s 2,610 towns; 2.1% rank higher.
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.
Halifax Regional Municipality has mapped flooding for Portland Estates (1 study)
Flood studies whose area touches Portland Estates, from NRCan’s inventory, each linked to its owner.
Halifax Regional Municipality holds the flood mapping that covers Portland Estates (2024), linked below.
| Study | By | Year | Status |
|---|---|---|---|
| Creation of Coastal, Pluvial, Fluvial Flood Hazard Maps for Halifax Regional Municipality | Halifax Regional Municipality | 2024 | final |
Towns with a flood study on file
88% of towns in Nova Scotia have a flood study, more than Canada’s 58%; Portland Estates has one too.
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 Portland Estates.
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 Portland Estates: $0.018 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.
Nothing unusual about Portland Estates’ ground: $0.018 against a typical $0.030, 0.6 times.
Shaking damage a year per $1,000 of building value
Neither high nor low in Nova Scotia: Portland Estates’ $0.018 sits by the median of $0.018, while Clare reaches $0.034.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
Earthquakes cost less around Portland Estates than in 68% of Canada’s 2,611 towns.
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 Portland Estates.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean). · Not measured by town: earthquake risk (the city of Halifax)
Test for radon in Portland Estates: 13% of area homes were over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline. · Source area for radon tests: the Zone 6 health region
At 13% over the guideline, the area around Portland Estates beats the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Portland Estates’ area, at 13%, is close to the median in Nova Scotia (13%); 1% of its tests passed 600 Bq/m³.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
More high tests than most: Portland Estates sits in a band that only 22% of Canada’s 2,611 towns share, with 4.6% above.
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.
Radon varies from house to house in Portland Estates, so the survey is a reason to test, not a result for yours.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Where to get warnings in Portland Estates
Alerts for Portland Estates 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 Portland Estates 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 Portland Estates
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Portland Estates | Moderate | $0.018 | 13% | Yes |
| Manor Park 14,148 · 2.6 km | Moderate | $0.018 | 13% | Yes |
| Cole Harbour 21,627 · 2.8 km | Moderate | $0.018 | 13% | Yes |
| Woodlawn 20,925 · 3.3 km | Moderate | $0.018 | 13% | Yes |
| Westphal 4,201 · 4.5 km | Moderate | $0.018 | 13% | Yes |
| Schmidtville 18,105 · 5.1 km | Moderate | $0.018 | 13% | Yes |
| Austinville 28,021 · 5.3 km | Moderate | $0.018 | 13% | Yes |
The fire record around Manor Park is a touch heavier than Portland Estates’, but the band is the same: moderate (here moderate).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Portland Estates faces
Practical steps for Portland Estates’ hazards, most pressing first.
- Clear needles and wood nearby.
- Keep a grab-and-go bag ready.
- In smoke, stay in; filter air.
- 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.
- Has it had a radon test?
- Check the address on the flood map.
- How close is the forest edge?
- Are flood and wildfire insured?
What this data can and can’t tell you
- 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 Portland Estates until then.
- Earthquakes are modelled. The earthquake figure is an expected loss, not a forecast, worked out by NRCan for each census subdivision, Portland Estates’ included.
- 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 Portland Estates.
- Flood studies aren’t flood zones. Flood studies cover areas of every size, which is why the page lists them for Portland Estates without grading them.
Questions about flooding and hazards in Portland Estates
How big is the earthquake risk in Portland Estates?
About $0.018 a year per $1,000 of building value, NRCan’s long-run expectation for Portland Estates.
How is Portland Estates’s Hazard risk Grade worked out?
Portland Estates grades B− for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
Is Portland Estates at risk of wildfire?
Not much by Canadian standards: Portland Estates’ band is moderate, with 2.5% of the land within 25 km burned since 1986 (last in 2025), so wildfire doesn’t change its grade.
Is radon a problem in Portland Estates?
13% of the 101 homes Health Canada tested around Portland Estates topped the guideline; your own house needs its own test.
Does Portland Estates flood?
A flood study covers Portland Estates on Canada’s Flood Map Inventory; open the owner’s map to check a street, since flood isn’t graded.
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).