Photo: Dennis G. Jarvis · CC BY-SA 2.0A flood study covers Sheet Harbour: 2 on the national inventory, the newest from Halifax Regional Municipality
Burn scars are few around Sheet Harbour, with 0.1% of the land within 25 km touched by fire since 1986 (0.002% a year). For earthquakes Sheet Harbour is middling, $0.018 a year per $1,000 against $0.030 for the typical town. Radon is higher than usual: 13% of tested homes in the survey area topped the guideline, against 6.6% for the typical town. Hazard risk gives Sheet Harbour a grade of B−; its wildfire band pulls it down.
What stands out about Sheet Harbour’s hazards
For Sheet Harbour, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Sheet Harbour faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Sheet Harbour grades B− for hazard risk
Earthquake risk and radon make Sheet Harbour’s grade; wildfire can only lower it, never raise it, and flood studies are listed but not scored.
Its place: #47 of 88 in Nova Scotia and #1,724 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.
Few fires near Sheet Harbour: 0% within 5 km, 0.1% within 25 km
Past fire around Sheet Harbour’s homes, from the national burned-area record, with the fuel within 5 km.
A burn rate of 0.002% a year keeps Sheet Harbour in the low band (the typical Canadian town: 0.000%).
No fire has burned within 5 km of Sheet Harbour’s homes since 1986; the nearest burn is 6.2 km away.
Forest fuel is spread evenly around Sheet Harbour: 92% within 5 km, 91% 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 Nova Scotia · highest of 90
Barrington tops the 90 towns in Nova Scotia at 0.46% a year; Sheet Harbour, at 0.002%, comes 60th.
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; Sheet Harbour 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.
2 flood studies cover Sheet Harbour, the newest from Halifax Regional Municipality
What Canada’s Flood Map Inventory lists for Sheet Harbour: who studied flooding and where to see their maps.
For Sheet Harbour the inventory points to 2 studies, most recently Halifax Regional Municipality’s in 2024.
| Study | By | Year | Status |
|---|---|---|---|
| Creation of Coastal, Pluvial, Fluvial Flood Hazard Maps for Halifax Regional Municipality | Halifax Regional Municipality | 2024 | final |
| Eastern Shore Flood Mapping Area | Province of Nova Scotia | 2024 | final · not public |
Towns with a flood study on file
Mapping in Nova Scotia reaches 88% of towns, Sheet Harbour 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.
Nothing here counts toward Risk; the studies are pointers to the maps their owners keep for Sheet Harbour.
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 Sheet Harbour $0.018 per $1,000 a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
Nothing unusual about Sheet Harbour’s ground: $0.018 against a typical $0.030, 0.6 times.
For earthquake risk, the only official count covers all of the city of Halifax, Sheet Harbour included.
Shaking damage a year per $1,000 of building value
Neither high nor low in Nova Scotia: Sheet Harbour’s $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.
68% of Canada’s 2,611 towns expect more shaking damage than Sheet Harbour.
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 Sheet Harbour.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
Test for radon in Sheet Harbour: 13% of area homes were over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
Radon runs above the typical Canadian town (6.6%) in Sheet Harbour’s area, at 13%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Around Sheet Harbour, 13% of tests topped the guideline, close to the typical town in Nova Scotia (13%); 1% were over 600.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Sheet Harbour is in the 10–20% band, with 22% of Canada’s 2,611 towns; only 4.6% are 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.
Neighbouring homes in Sheet Harbour can differ a lot; only a long-term test tells you about yours.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011). · Radon tests: one figure for all of the Zone 6 health region
Where to get warnings in Sheet Harbour
Environment and Climate Change Canada issues the weather alerts for Sheet Harbour; 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 Sheet Harbour, and listen to local authorities for orders.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Get ready for what Sheet Harbour faces
Practical steps for Sheet Harbour’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
- 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 Sheet Harbour.
- Radon is a survey. About 14,000 homes were tested across Canada in 2009–2011, and the share over the guideline for Sheet Harbour is its health region’s, the survey’s design unit.
- Earthquakes are modelled. The earthquake figure is an expected loss, not a forecast, worked out by NRCan for each census subdivision, Sheet Harbour’s 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 Sheet Harbour.
Questions about flooding and hazards in Sheet Harbour
Is Sheet Harbour at risk of wildfire?
Not much by Canadian standards: Sheet Harbour’s band is low, with 0.1% of the land within 25 km burned since 1986 (last in 2023), so wildfire doesn’t change its grade.
How big is the earthquake risk in Sheet Harbour?
NRCan’s model expects shaking to cost buildings in Sheet Harbour $0.018 a year for every $1,000 of their value, on average over many years.
Is radon a problem in Sheet Harbour?
13% of the 101 homes Health Canada tested around Sheet Harbour topped the guideline; your own house needs its own test.
How is Sheet Harbour’s Hazard risk Grade worked out?
Sheet Harbour’s Hazard risk grade is B−, built on earthquakes and radon with a one-sided wildfire input.
Does Sheet Harbour flood?
There is flood mapping for Sheet Harbour on the national inventory, each study linked to its owner’s map, none of them 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).