Photo: Veillg1 · CC BY-SA 4.0Hazards in Sainte-Julie: wildfire low, radon over the guideline in 8.2% of tested homes
Fire seldom reaches Sainte-Julie: since 1986, 0.1% of the land within 25 km has burned (0.001% a year). Earthquakes add more: NRCan’s model puts building losses at $0.19 a year per $1,000 of value, against $0.030 for the typical town. Sainte-Julie grades C− for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Sainte-Julie’s hazards
Four national sources, each read for Sainte-Julie: earthquakes, radon, past fires and flood studies.
What Sainte-Julie faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Sainte-Julie grades C− for hazard risk
For Sainte-Julie, Risk will be the average of earthquakes and radon, with wildfire added only if it makes the average worse.
Its place: #347 of 507 in Quebec and #2,315 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.
Few fires near Sainte-Julie: 0.3% within 5 km, 0.1% within 25 km
Past fire around Sainte-Julie’s homes, from the national burned-area record, with the fuel within 5 km.
Low by Canadian standards: 0.001% of the land a year around Sainte-Julie, 0.000% for the typical Canadian town.
Around Sainte-Julie the forest is thin or far off: 2.2% of the land within 5 km and 1.3% within 25 km is forest fuel.
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 Quebec · highest of 513
Sainte-Julie burns at 0.001% a year, 136th of 513 towns in Quebec; the leader, Mistissini, reaches 0.31%.
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.
Sainte-Julie is in the low band with 92% of Canada’s 2,610 towns; 7.5% sit in moderate or 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.
No flood study is listed for Sainte-Julie
What Canada’s Flood Map Inventory lists for Sainte-Julie: who studied flooding and where to see their maps.
There is no study for Sainte-Julie on the national flood inventory, which is far from complete.
Towns with a flood study on file
Mapping in Quebec reaches 45% of towns, below the 58% across Canada, and not Sainte-Julie.
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 Sainte-Julie.
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.”
Earthquakes cost buildings in Sainte-Julie $0.19 per $1,000 a year
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
Roughly 6.2 times the typical $0.030: Sainte-Julie’s $0.19 marks real seismic exposure.
Shaking damage a year per $1,000 of building value
At $0.19, Sainte-Julie is above the typical town in Quebec ($0.14); La Pocatière has the most at $0.48.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
More earthquake risk than most: only 13% of Canada’s 2,611 towns are above Sainte-Julie.
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 Sainte-Julie’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).
Radon about average around Sainte-Julie: 8.2% over the guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline. · Source area for radon tests: the Monteregie health region
Near the middle for radon: Sainte-Julie’s area 8.2%, the typical Canadian town 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
The typical town in Quebec has 8.2% over 200 Bq/m³; Sainte-Julie’s area has 8.2%, much the same.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Radon tops the guideline in a modest share of homes around Sainte-Julie, a band holding 37% of Canada’s 2,611 towns; 26% rank 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.
The share describes the area, not a house: in Sainte-Julie as anywhere, test to be sure.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Sainte-Julie
Alerts for Sainte-Julie 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 Sainte-Julie 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 Sainte-Julie
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Sainte-Julie | Low | $0.19 | 8.2% | None listed |
| Saint-Bruno-de-Montarville 26,786 · 6.8 km | Low | $0.16 | 8.2% | None listed |
| Saint-Mathieu-de-Beloeil 2,999 · 6.9 km | Low | $0.15 | 8.2% | Yes |
| Saint-Amable 14,119 · 7.0 km | Low | $0.19 | 8.2% | None listed |
| Boucherville 41,910 · 8.0 km | Low | $0.20 | 8.2% | Yes |
| Saint-Basile-le-Grand 17,146 · 8.2 km | Low | $0.18 | 8.2% | Yes |
| McMasterville 6,114 · 9.1 km | Low | $0.18 | 8.2% | Yes |
Saint-Bruno-de-Montarville burns a little more than Sainte-Julie, in the same low band (low here).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Sainte-Julie faces
Practical steps for Sainte-Julie’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.
- Drop, cover and hold on.
- Strap the water heater down.
- Keep 72 hours of supplies.
- Has it had a radon test?
- Ask the municipality for flood maps.
- Are flood and wildfire insured?
- Is earthquake cover included?
What this data can and can’t tell you
- 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 Sainte-Julie’s.
- Radon is a survey. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Sainte-Julie takes its 2007 health region’s share.
- Wildfire counts one way. The wildfire figure is the share of land within 25 km of Sainte-Julie’s homes burned each year from 1986 to 2025, past fire rather than a forecast, and it can only lower Risk.
- 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 Sainte-Julie.
Questions about flooding and hazards in Sainte-Julie
How is Sainte-Julie’s Hazard risk Grade worked out?
Sainte-Julie grades C− for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
Is Sainte-Julie at risk of wildfire?
Some, but Sainte-Julie’s low band (0.1% of nearby land burned since 1986, latest 2024) is short of the level that counts.
Is radon a problem in Sainte-Julie?
The area’s survey found 8.2% of 110 tested homes above Health Canada’s guideline, so a three-month test is worth doing in Sainte-Julie.
How big is the earthquake risk in Sainte-Julie?
In NRCan’s seismic model, Sainte-Julie’s buildings lose $0.19 per $1,000 of value in an average year.
Does Sainte-Julie flood?
The inventory has 0 studies for Sainte-Julie, and an empty list isn’t a clean bill: the municipality holds any flood maps.
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).