Photo: Earth Science and Remote Sensing Unit , Lyndon B. Johnson Space Center · Public domainEarthquakes are Electoral Area E, Cowichan Valley’s biggest hazard: $0.83 of damage a year per $1,000 of buildings, 28 times the norm
Little of the land around Electoral Area E, Cowichan Valley has burned: 0.1% within 25 km since 1986, or 0.003% a year. Fewer homes than usual carry radon here, 0.9% over the guideline where the typical town has 6.6%. Hazard risk gives Electoral Area E, Cowichan Valley a grade of B−; its wildfire band pulls it down.
What stands out about Electoral Area E, Cowichan Valley’s hazards
For Electoral Area E, Cowichan Valley, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Electoral Area E, Cowichan Valley faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Electoral Area E, Cowichan Valley grades B− for hazard risk
For Electoral Area E, Cowichan Valley, Risk will be the average of earthquakes and radon, with wildfire added only if it makes the average worse.
Its place: #165 of 254 in British Columbia and #1,700 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.
Little of the land around Electoral Area E, Cowichan Valley has burned: 0.1% within 5 km, 0.1% within 25 km since 1986
Past fire around Electoral Area E, Cowichan Valley’s homes, from the national burned-area record, with the fuel within 5 km.
Next to the typical Canadian town (0.000% a year), Electoral Area E, Cowichan Valley’s 0.003% is in the low band.
The nearer ring around Electoral Area E, Cowichan Valley is less wooded (56% forest fuel) than the land out to 25 km (77%).
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 British Columbia · highest of 255
Some fire is mapped around Electoral Area E, Cowichan Valley (0.003% a year), but it ranks only 191st of 255 towns in British Columbia; Oliver has 0.98%.
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; Electoral Area E, Cowichan Valley 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.
Electoral Area E, Cowichan Valley is on the flood map inventory: 2 studies, latest by Cowichan Valley Regional District
What Canada’s Flood Map Inventory lists for Electoral Area E, Cowichan Valley: who studied flooding and where to see their maps.
Cowichan Valley Regional District and others have studied flooding in areas that include Electoral Area E, Cowichan Valley: 2 studies, the latest from 2009.
| Study | By | Year | Status |
|---|---|---|---|
| Lower Cowichan/Koksilah River Integrated Flood Management Plan | Cowichan Valley Regional District | 2009 | final |
| Cowichan and Koksilah Rivers at Duncan Floodplain Mapping | Ministry of Environment and Climate Change Strategy | 1997 | final |
Towns with a flood study on file
76% of towns in British Columbia have a flood study, more than Canada’s 58%; Electoral Area E, Cowichan Valley has one too.
NRCan Canada Flood Map Inventory: a study footprint touching the town’s boundary; towns of 2,500 people or more.
No single decade dominates: 2 studies for Electoral Area E, Cowichan Valley between the 1990s and the 2000s.
Study dates as the NRCan inventory lists them, one count per study touching Electoral Area E, Cowichan Valley.
The grade leaves flood out, since a study area says nothing about how many of Electoral Area E, Cowichan Valley’s homes are at risk.
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.
Shaking is Electoral Area E, Cowichan Valley’s costliest hazard: $0.83 a year per $1,000
Expected yearly building losses from earthquakes, from Natural Resources Canada’s model.
Electoral Area E, Cowichan Valley’s $0.83 is about 27.7 times the typical town’s $0.030: it sits in one of Canada’s more active seismic zones.
Shaking damage a year per $1,000 of building value
Earthquake risk in British Columbia peaks in Duncan ($1.33); Electoral Area E, Cowichan Valley, at $0.83, sits above the median of $0.36.
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 Electoral Area E, Cowichan Valley: 0.3% 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 Electoral Area E, Cowichan Valley 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).
0.9% of homes tested around Electoral Area E, Cowichan Valley are over the radon guideline
Long-term radon tests in homes across the survey area, against Health Canada’s guideline.
At 0.9% over the guideline, the area around Electoral Area E, Cowichan Valley is under the typical Canadian town’s 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Against the typical town in British Columbia (1.8%), the area around Electoral Area E, Cowichan Valley has fewer high tests: 0.9%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Under 5% puts Electoral Area E, Cowichan Valley with 37% of Canada’s 2,611 towns; 63% have more high tests.
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 Electoral Area E, Cowichan Valley’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). · Radon tests: the Central Vancouver Island health region
Where to get warnings in Electoral Area E, Cowichan Valley
Environment and Climate Change Canada issues the weather alerts for Electoral Area E, Cowichan Valley; 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 Electoral Area E, Cowichan Valley, and listen to local authorities for orders.
Weather alerts (ECCC) · Alert Ready · Fire danger and active fires (CWFIS)
Hazards in the places around Electoral Area E, Cowichan Valley
Wildfire band, earthquake risk, radon and flood studies for each place nearby.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Electoral Area E, Cowichan Valley | Low | $0.83 | 0.9% | Yes |
| Cowichan 2,509 · 1.2 km | Low | $0.72 | 0.9% | Yes |
| Duncan 5,745 · 1.5 km | Low | $1.33 | 0.9% | Yes |
| North Cowichan 34,525 · 5.1 km | Low | $0.76 | 0.9% | Yes |
| Cowichan Bay 3,713 · 7.3 km | Low | $1.08 | 0.9% | Yes |
| Cobble Hill 5,074 · 12 km | Low | $0.68 | 0.9% | None listed |
| Shawnigan 9,903 · 13 km | Low | $0.57 | 0.9% | Yes |
Shawnigan burns a little more than Electoral Area E, Cowichan Valley, 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 Electoral Area E, Cowichan Valley faces
Practical steps for Electoral Area E, Cowichan Valley’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?
- Check the address on the flood map.
- Are flood and wildfire insured?
- Is earthquake cover included?
What this data can and can’t tell you
- Wildfire counts one way. For Electoral Area E, Cowichan Valley, wildfire means how much nearby land burned in the past forty years, a one-way input that can pull Risk down and nothing more.
- 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 Electoral Area E, Cowichan Valley.
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Electoral Area E, Cowichan Valley’s census subdivision (a neighbourhood shows its city’s).
- Radon is a survey. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Electoral Area E, Cowichan Valley takes its 2007 health region’s share.
Questions about flooding and hazards in Electoral Area E, Cowichan Valley
Is Electoral Area E, Cowichan Valley at risk of wildfire?
Not much by Canadian standards: Electoral Area E, Cowichan Valley’s band is low, with 0.1% of the land within 25 km burned since 1986 (last in 2022), so wildfire doesn’t change its grade.
How is Electoral Area E, Cowichan Valley’s Hazard risk Grade worked out?
Electoral Area E, Cowichan Valley grades B− for hazard risk, from earthquakes and radon, with wildfire counted only where it lowers the grade.
How big is the earthquake risk in Electoral Area E, Cowichan Valley?
NRCan’s model expects shaking to cost buildings in Electoral Area E, Cowichan Valley $0.83 a year for every $1,000 of their value, on average over many years.
Does Electoral Area E, Cowichan Valley flood?
The inventory lists a study touching Electoral Area E, Cowichan Valley; whether a given street floods is on that map, not in the grade.
Is radon a problem in Electoral Area E, Cowichan Valley?
0.9% of the 109 homes Health Canada tested around Electoral Area E, Cowichan Valley topped the guideline; your own house needs its own test.
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).