Photo: WayeMason · CC BY-SA 3.0Halifax is on Canada’s flood inventory: 7 listed, led by Halifax Regional Municipality
Fire seldom reaches Halifax: since 1986, 0.5% of the land within 25 km has burned (0.01% a year). NRCan expects $0.018 of shaking damage a year per $1,000 of buildings in Halifax, near the typical $0.030. In Health Canada’s survey, 13% of homes tested in the area exceeded 200 Bq/m³ (6.6% typical).
What stands out about Halifax’s hazards
Four national sources, each read for Halifax: earthquakes, radon, past fires and flood studies.
What Halifax faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Halifax isn’t graded for hazard risk yet
Risk averages earthquakes and radon; wildfire joins only where it pulls the average down, so a town like Halifax with little fire nearby would get no credit for it.
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 Halifax has burned: 1.3% within 5 km, 0.5% within 25 km since 1986
Past fire around Halifax’s homes, from the national burned-area record, with the fuel within 5 km.
Forty years of fire maps put Halifax at 0.01% a year, low next to the typical Canadian town’s 0.000%.
Forest thickens with distance from Halifax: 79% of the land within 5 km, 86% 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 91
Halifax burns at 0.01% a year, 43rd of 91 towns in Nova Scotia; the leader, Barrington, reaches 0.46%.
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.
Some fire is mapped around Halifax, but not enough to leave the low band, where 92% of Canada’s 2,610 towns are; 7.5% 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.
Flooding around Halifax is mapped in 7 studies, the newest by Halifax Regional Municipality
What Canada’s Flood Map Inventory lists for Halifax: who studied flooding and where to see their maps.
7 studies on the inventory touch Halifax, the newest Halifax Regional Municipality’s from 2024, and their areas can be large, so they say maps exist, not that the town floods.
| Study | By | Year | Status |
|---|---|---|---|
| Creation of Coastal, Pluvial, Fluvial Flood Hazard Maps for Halifax Regional Municipality | Halifax Regional Municipality | 2024 | final |
| Nova Scotia Flood Mapping Minas Basin Area | Province of Nova Scotia | 2024 | final · not public |
| Eastern Shore Flood Mapping Area | Province of Nova Scotia | 2024 | final · not public |
| Shubenacadie Lakes Floodplain Study | Halifax Regional Municipality | 2020 | final |
| Fundy Agricultural Marshlands Flood Maps | Nova Scotia Department of Agriculture, Saint Mary’s University | 2018 | final · not public |
| Sackville River | Halifax Regional Municipality | 2017 | final |
| East Hants | Municipality of East Hants | 2013 | final |
Towns with a flood study on file
Halifax is one of the 88% of towns in Nova Scotia with a flood study on file; across Canada it is 58%.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
The 2020s brought the most flood studies for Halifax (4 of 7), the first dating from the 2010s.
Study dates as the NRCan inventory lists them, one count per study touching Halifax.
Flood mapping is shown for Halifax to be opened and checked, never turned into a grade.
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 Halifax: $0.018 per $1,000 of buildings a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
Halifax’s $0.018 is close to the typical town’s $0.030 (0.6 times as much).
Shaking damage a year per $1,000 of building value
About level with the typical town in Nova Scotia: Halifax’s $0.018 against $0.018; 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 Halifax.
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 loss is to Halifax’s buildings alone, from ground shaking; infrastructure and secondary hazards are left out.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean).
Radon runs high around Halifax: 13% of tested homes over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline. · The radon tests numbers here cover the Zone 6 health region
Radon runs above the typical Canadian town (6.6%) in Halifax’s area, at 13%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Around Halifax, 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.
Halifax 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.
A survey sample isn’t a map: any home in Halifax can be high, and a three-month test is the only way to know.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Halifax
Alerts for Halifax 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. |
Fire danger and active fires near Halifax are mapped daily by the Canadian Wildland Fire Information System; evacuation orders come from the municipality or province.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Halifax
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Halifax | Low | $0.018 | 13% | Yes |
| Austinville 28,021 · 1.4 km | Moderate | $0.018 | 13% | Yes |
| Windsor Park 13,044 · 3.3 km | Moderate | $0.018 | 13% | Yes |
| North End 19,733 · 3.6 km | Moderate | $0.018 | 13% | Yes |
| Manor Park 14,148 · 3.9 km | Moderate | $0.018 | 13% | Yes |
| Fairview 16,296 · 4.8 km | Moderate | $0.018 | 13% | Yes |
| Woodlawn 20,925 · 4.9 km | Moderate | $0.018 | 13% | Yes |
Manor Park has the most fire around it, a moderate band against Halifax’s low.
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Halifax faces
What to do about the hazards Halifax 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
- 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 Halifax.
- Earthquakes are modelled. NRCan models what earthquakes would cost buildings each year on average, subdivision by subdivision; Halifax’s figure is its subdivision’s.
- Wildfire counts one way. Wildfire is read from the national burned-area record around Halifax’s homes since 1986, a history of fire that may lower Risk but never raises it.
- Radon is a survey. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Halifax takes its 2007 health region’s share.
Questions about flooding and hazards in Halifax
Does Halifax flood?
The inventory lists a study touching Halifax; whether a given street floods is on that map, not in the grade.
How is Halifax’s Hazard risk Grade worked out?
Not yet: Canada’s grades come with its first grading run, when Risk will weigh earthquakes and radon in Halifax, with wildfire able only to lower it.
Is Halifax at risk of wildfire?
Fire has reached 0.5% of the land around Halifax since 1986 (last in 2025); at low, it neither helps nor hurts the grade.
Is radon a problem in Halifax?
Around Halifax, 101 survey homes were tested and 13% came in over 200 Bq/m³, a guide to the area, not to any one home.
How big is the earthquake risk in Halifax?
NRCan’s model expects shaking to cost buildings in Halifax $0.018 a year for every $1,000 of their value, on average over many years.
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).