Photo: Héron du fleuve · CC0Wildfire low, radon 6.8%: how Longue-Pointe stands on hazards
Wildfire is rare near Longue-Pointe: 0.1% of the land within 25 km has burned since 1986, a burn rate of 0.002% a year. Shaking is a bigger worry than in most places, at $0.20 a year per $1,000 of building value ($0.030 typical). Longue-Pointe grades C for hazard risk; wildfire is low here, so it earns no credit.
What stands out about Longue-Pointe’s hazards
For Longue-Pointe, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Longue-Pointe faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Longue-Pointe grades C for hazard risk
Seismic risk and radon set Longue-Pointe’s grade, wildfire can drag it down, and flood mapping stays out of it.
Its place: #161 of 507 in Quebec and #2,110 of 2,589 Canadian towns.
How sure: Earthquake losses are a model’s expectation over many years, not a forecast for any one. Only 74 homes were tested in the survey area, so the radon share is rough. The burned-area record misses fires under about 10 ha and most grass and farm fires.
Few fires near Longue-Pointe: 0% within 5 km, 0.1% within 25 km
Fires mapped since 1986 around where Longue-Pointe’s residents live, and the fuel next to their homes.
Low by Canadian standards: 0.002% of the land a year around Longue-Pointe, 0.000% for the typical Canadian town.
Since 1986 the nearest fire to Longue-Pointe’s homes came within 16 km, never inside 5 km.
Only 1.5% of the land within 25 km of Longue-Pointe is forest fuel, and 0.4% close in.
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
Mistissini burns fastest in Quebec at 0.31% a year; Longue-Pointe, at 0.002%, ranks 35th of 513.
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.
Low, like 92% of the country’s 2,610 towns: the land around Longue-Pointe burns, but slower than in the 7.5% above it.
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 Longue-Pointe
Flood studies whose area touches Longue-Pointe, from NRCan’s inventory, each linked to its owner.
NRCan’s inventory is silent on Longue-Pointe, so any flood map would be the municipality’s own.
Towns with a flood study on file
Only 45% of towns in Quebec have a flood study, short of Canada’s 58%, and Longue-Pointe is not among them.
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 Longue-Pointe.
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 Longue-Pointe $0.20 per $1,000 a year
NRCan’s seismic risk model: the damage shaking is expected to do to buildings each year, on average over many years.
Roughly 6.7 times the typical $0.030: Longue-Pointe’s $0.20 marks real seismic exposure.
Shaking damage a year per $1,000 of building value
Above the middle in Quebec: Longue-Pointe’s $0.20 against a median of $0.14, with La Pocatière highest 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.
Few of Canada’s 2,611 towns face more earthquake damage than Longue-Pointe: 8.5% of them.
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).
Only shaking damage to buildings in Longue-Pointe is counted; landslides, liquefaction, tsunami and fire after a quake aren’t.
Natural Resources Canada, Canada’s Seismic Risk Model (2022), by census subdivision (2016 boundaries; a few 2021 subdivisions take their residents’ mean). · Area behind the earthquake risk figures: the city of Montréal
Radon about average around Longue-Pointe: 6.8% 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 Montreal health region
At 6.8% over the guideline, the area around Longue-Pointe is about level with the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Around Longue-Pointe, 6.8% of tests topped the guideline, about the same as the typical town in Quebec (8.2%).
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 Longue-Pointe, 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.
Whatever Longue-Pointe’s area share, the reading that matters is your own home’s, over a winter.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Where to get warnings in Longue-Pointe
Environment and Climate Change Canada issues the weather alerts for Longue-Pointe; 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 Longue-Pointe, and listen to local authorities for orders.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Longue-Pointe
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Longue-Pointe | Low | $0.20 | 6.8% | None listed |
| Guybourg 3,554 · 1.4 km | Low | $0.20 | 6.8% | None listed |
| Louis-Riel 19,647 · 1.5 km | Low | $0.20 | 6.8% | None listed |
| Maisonneuve 20,651 · 2.6 km | Low | $0.20 | 6.8% | None listed |
| Marie-Victorin 28,904 · 2.6 km | Low | $0.20 | 6.8% | None listed |
| Beaurivage 13,574 · 2.8 km | Low | $0.20 | 6.8% | None listed |
| Tétreaultville 19,390 · 2.9 km | Low | $0.20 | 6.8% | None listed |
Longue-Pointe’s low band tops its neighbours; Guybourg is next (low).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Longue-Pointe faces
Practical steps for Longue-Pointe’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
- Radon is a survey. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Longue-Pointe takes its 2007 health region’s share.
- Earthquakes are modelled. The earthquake figure is an expected loss, not a forecast, worked out by NRCan for each census subdivision, Longue-Pointe’s included.
- 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 Longue-Pointe.
- 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 Longue-Pointe.
Questions about flooding and hazards in Longue-Pointe
Does Longue-Pointe flood?
The inventory has 0 studies for Longue-Pointe, and an empty list isn’t a clean bill: the municipality holds any flood maps.
How big is the earthquake risk in Longue-Pointe?
Expected earthquake damage in Longue-Pointe comes to $0.20 a year for each $1,000 that buildings are worth.
Is Longue-Pointe at risk of wildfire?
Some, but Longue-Pointe’s low band (0.1% of nearby land burned since 1986, latest 2019) is short of the level that counts.
Is radon a problem in Longue-Pointe?
The area’s survey found 6.8% of 74 tested homes above Health Canada’s guideline, so a three-month test is worth doing in Longue-Pointe.
How is Longue-Pointe’s Hazard risk Grade worked out?
Longue-Pointe grades C for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers 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).