Photo: Eric Friedebach · CC BY 3.0Flood mapping exists for Merritt: 2 on record, latest by Fraser Basin Council
Wildfire is a moderate presence around Merritt: 6.8% of the land within 25 km has burned since 1986, 0.17% a year, short of the band that counts against Risk. NRCan expects $0.042 of shaking damage a year per $1,000 of buildings in Merritt, near the typical $0.030. Radon around Merritt is ordinary for Canada: 6.4% of tested homes over the guideline (6.6% typical). Hazard risk gives Merritt a grade of B; its wildfire band pulls it down.
What stands out about Merritt’s hazards
For Merritt, from NRCan’s seismic model, Health Canada’s radon survey, the national burned-area record and the flood map inventory.
What Merritt faces
Each hazard against its own yardstick; meters run from low to high on that yardstick.
Wildfire
Earthquakes
Radon
Flood study
Merritt grades B for hazard risk
For Merritt, Risk will be the average of earthquakes and radon, with wildfire added only if it makes the average worse.
Its place: #24 of 254 in British Columbia and #1,397 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.
A moderate wildfire record for Merritt: 6.8% within 25 km burned, 1.9% within 5 km
Fires mapped since 1986 around where Merritt’s residents live, and the fuel next to their homes.
Moderate: the land around Merritt burns at 0.17% a year, where the typical Canadian town sees 0.000%.
Forest thickens with distance from Merritt: 31% of the land within 5 km, 52% 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 British Columbia · highest of 255
The land around Merritt burns at 0.17% a year, the 39th highest rate of 255 towns in British Columbia; Oliver tops it at 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.
Merritt is in the moderate band, which holds 5.4% of Canada’s 2,610 towns; 2.1% 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.
2 flood studies cover Merritt, the newest from Fraser Basin Council
Flood studies whose area touches Merritt, from NRCan’s inventory, each linked to its owner.
The newest of 2 studies covering Merritt is Fraser Basin Council’s, from 2020; open its map to see the zones.
| Study | By | Year | Status |
|---|---|---|---|
| Thompson River Watershed Base Level Flood Hazard Mapping | Fraser Basin Council | 2020 | final |
| Nicola River Spences Bridge to Nicola Lake Floodplain Mapping (including Coldwater River and Spius Creek) | Ministry of Environment and Climate Change Strategy | 1989 | final |
Towns with a flood study on file
Flood maps are common in British Columbia: 76% of towns have one, against 58% nationally, and Merritt is among them.
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 Merritt between the 1980s and the 2020s.
Study dates as the NRCan inventory lists them, one count per study touching Merritt.
Flood studies don’t enter the grade; they are listed so you can open the official map for Merritt.
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.
Earthquakes cost buildings in Merritt $0.042 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.
Nothing unusual about Merritt’s ground: $0.042 against a typical $0.030, 1.4 times.
Shaking damage a year per $1,000 of building value
Merritt’s $0.042 sits under the median in British Columbia, $0.36, and well under Duncan’s $1.33.
NRCan seismic risk model (2022): mean yearly building loss per $1,000 of value; medians of towns of 2,500 people or more.
Merritt sits mid-range among Canada’s 2,611 towns: 43% expect more shaking damage.
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).
What a quake does after the shaking, fire, landslides, tsunami, falls outside NRCan’s figure for Merritt.
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 Merritt: 6.4% over the guideline
Health Canada’s survey of long-term home tests: the share above the 200 Bq/m³ guideline. · Area-wide: radon tests, counted over the Thompson/Cariboo health region
6.4% of tested homes around Merritt were over the guideline, much like the typical Canadian town at 6.6%.
Tested homes over 200 Bq/m³
Over 600 Bq/m³
Radon runs higher around Merritt than in most towns in British Columbia: 6.4% against 1.8%.
Health Canada radon survey (2009–2011), by 2007 health region; medians of towns of 2,500 people or more.
Between 5% and 10% of tests over the guideline: Merritt, and 37% of Canada’s 2,611 towns; 26% 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.
Radon varies from house to house in Merritt, so the survey is a reason to test, not a result for yours.
Health Canada, Cross-Canada Survey of Radon Concentrations in Homes (2009–2011).
Where to get warnings in Merritt
Alerts for Merritt 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 Merritt 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 Merritt
The same four hazards for the places next door.
| Town | Wildfire | Quake $/1,000 | Radon | Flood study |
|---|---|---|---|---|
| Merritt | Moderate | $0.042 | 6.4% | Yes |
| Electoral Area M (Beautiful Nicola Valley - North), Thompson-Nicola 1,731 · 8.9 km | Moderate | $0.028 | 6.4% | Yes |
The fire record around Electoral Area M (Beautiful Nicola Valley - North), Thompson-Nicola is a touch heavier than Merritt’s, but the band is the same: moderate (here moderate).
Radon is the survey area’s figure, so neighbours in one area share it.
Get ready for what Merritt faces
Practical steps for Merritt’s hazards, most pressing first.
- 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?
- Check the address on the flood map.
- How close is the forest edge?
- Are flood and wildfire insured?
What this data can and can’t tell you
- Earthquakes are modelled. Seismic risk is NRCan’s model of yearly building losses from shaking, averaged over many years and given for Merritt’s census subdivision (a neighbourhood shows its city’s).
- 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 Merritt.
- Radon is a survey. Health Canada’s survey tested some 14,000 homes over three months; until postal-area boundaries are loaded, Merritt takes its 2007 health region’s share.
- Wildfire counts one way. For Merritt, wildfire means how much nearby land burned in the past forty years, a one-way input that can pull Risk down and nothing more.
Questions about flooding and hazards in Merritt
How big is the earthquake risk in Merritt?
Expected earthquake damage in Merritt comes to $0.042 a year for each $1,000 that buildings are worth.
Is Merritt at risk of wildfire?
Not much by Canadian standards: Merritt’s band is moderate, with 6.8% of the land within 25 km burned since 1986 (last in 2024), so wildfire doesn’t change its grade.
Does Merritt flood?
The inventory lists a study touching Merritt; whether a given street floods is on that map, not in the grade.
Is radon a problem in Merritt?
6.4% of the 109 homes Health Canada tested around Merritt topped the guideline; your own house needs its own test.
How is Merritt’s Hazard risk Grade worked out?
Merritt grades B 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).