Photo: Susan Drury from Watson Lake, Canada · CC BY 2.0Watson Lake faces more hazards than 92% of Canadian towns
The burn rate around Watson Lake is 0.06% a year (2.6% of the land within 25 km since 1986), a moderate band. Seismic risk runs high: $0.088 of expected damage per $1,000 of buildings a year, the typical town $0.030. In Health Canada’s survey, 20% of homes tested in the area exceeded 200 Bq/m³ (6.6% typical). Hazard risk gives Watson Lake a grade of D; its wildfire band pulls it down.
What stands out about Watson Lake’s hazards
Four national sources, each read for Watson Lake: earthquakes, radon, past fires and flood studies.
What Watson Lake faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Hazard risk in Watson Lake: D
The grade weighs Watson Lake’s seismic risk and radon equally, and wildfire is one-sided: a high band counts against a town, a low one earns nothing.
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.
A moderate wildfire record for Watson Lake: 2.6% within 25 km burned, 0% within 5 km
Fires mapped since 1986 around where Watson Lake’s residents live, and the fuel next to their homes.
At 0.06% of the land a year, Watson Lake’s burn rate is moderate; the typical Canadian town sees 0.000%.
Fire has stayed at least 5.3 km from Watson Lake’s homes since 1986.
Near or far, forest fuel covers a similar share around Watson Lake: 92% within 5 km and 97% 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).
Moderate puts Watson Lake above most of Canada’s 2,610 towns, yet 2.1% rank high or very high and 5.4% share its band.
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 Watson Lake
Flood studies whose area touches Watson Lake, from NRCan’s inventory, each linked to its owner.
No flood study on the national inventory covers Watson Lake; ask the municipality, which is the authority for its flood maps.
Towns with a flood study on file
Watson Lake has no flood study on file; 58% of Canada’s towns have one.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
Flood is shown here, never graded: a study says where a map exists, not how many of Watson Lake’s homes stand in a flood zone.
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.”
Shaking is Watson Lake’s costliest hazard: $0.088 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.
The typical town loses $0.030 a year to shaking; Watson Lake loses $0.088, 2.9 times as much.
Shaking damage a year per $1,000 of building value
With too few towns in Yukon for a median of their own, Watson Lake is set beside Canada’s: $0.088 against $0.030.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
Watson Lake sits above most of Canada’s 2,611 towns on earthquake risk; 27% are higher.
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 Watson Lake’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).
20% of homes tested around Watson Lake are over the radon guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline. · Measured across the Yukon Territory health region: radon tests
A higher share than most: 20% of tested homes around Watson Lake, the typical Canadian town 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
No median in Yukon to compare with, the territory having too few towns; around Watson Lake, 5.8% of tests passed 600 Bq/m³.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
The 10–20% band holds 22% of Canada’s 2,611 towns, Watson Lake among them; 4.6% 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.
One home in Watson Lake can be high while next door is low; a three-month test settles it.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Weather and fire alerts for Watson Lake
Environment and Climate Change Canada issues the weather alerts for Watson Lake; 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. |
Smoke and fire warnings for Watson Lake come through Environment Canada and Alert Ready; the fire map is CWFIS’s.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Get ready for what Watson Lake faces
What to do about the hazards Watson Lake faces, and what to ask before you buy.
- 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?
- Ask the municipality for flood maps.
- How close is the forest edge?
- Are flood and wildfire insured?
What this data can and can’t tell you
- Wildfire counts one way. The wildfire figure is the share of land within 25 km of Watson Lake’s homes burned each year from 1986 to 2025, past fire rather than a forecast, and it can only lower Risk.
- 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 Watson Lake’s.
- Radon is a survey. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Watson Lake takes its 2007 health region’s share.
- 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 Watson Lake.
Questions about flooding and hazards in Watson Lake
Is Watson Lake at risk of wildfire?
Fire has reached 2.6% of the land around Watson Lake since 1986 (last in 2018); at moderate, it neither helps nor hurts the grade.
Does Watson Lake flood?
With 0 studies on the inventory, Watson Lake’s flood risk is unmapped nationally; check with the municipality before buying.
How big is the earthquake risk in Watson Lake?
About $0.088 a year per $1,000 of building value, NRCan’s long-run expectation for Watson Lake.
How is Watson Lake’s Hazard risk Grade worked out?
Watson Lake’s Hazard risk grade is D, built on earthquakes and radon with a one-sided wildfire input.
Is radon a problem in Watson Lake?
Around Watson Lake, 225 survey homes were tested and 20% came in over 200 Bq/m³, a guide to the area, not to any one home.
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).