Boundary County, Idaho: Natural Disaster Risk and History
Boundary County, Idaho has a Very Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 26.1 out of 100, higher than about 26% of US counties, with landslides, avalanches and wildfires scoring highest of its 18 hazards and $6.8 million a year in expected losses.
OpenFEMA lists 10 federal disaster declarations that included Boundary County since 1967, not counting 2 for COVID-19; the latest is DR-4905-ID (Straight-Line Winds, declared 7 April 2026). NOAA's Storm Prediction Center has no tornado on record touching Boundary County from 1950 to 2025.
Live weather alerts for Idaho All official warnings Latest FEMA declarations
Population 12,050 Buildings worth $3.2 billion Area 1,291 sq mi Risk rank in Idaho 29 of 44 FIPS 16021
All 18 hazards, highest risk first
FEMA National Risk Index| Hazard | Risk rating | Score | Expected loss a year | How often | Events in record |
|---|---|---|---|---|---|
| Landslide | Relatively Moderate | 97.7 | $368,639 | about once every 1.5 years | — |
| Avalanche | Relatively Moderate | 82.6 | $486,786 | about once every 10 years | 3 |
| Wildfire | Relatively Low | 80.7 | $339,703 | rarer than once in 1,000 years | — |
| Winter weather | Relatively Moderate | 68.4 | $96,095 | about 27 a year | 515 |
| Cold wave | Relatively Low | 47.9 | $683,902 | about 1.4 a year | 27 |
| Inland flooding | Relatively Low | 45.8 | $4.6 million | about once every 2.0 years | 14 |
| Heat wave | Very Low | 30.9 | $111,802 | about 2.8 a year | 27 |
| Earthquake | Very Low | 25.4 | $36,143 | about once every 704 years | — |
| Lightning | Very Low | 17.9 | $47,631 | about 21 a year | 22,627 strikes |
| Drought | Very Low | 15.2 | $520 | about 22 a year | 588 |
| Strong wind | Very Low | 5.2 | $28,020 | about once every 8.5 years | 5 |
| Hail | Very Low | 3.8 | $6,012 | about once every 7.4 years | 5.1 |
| Tornado | Very Low | 3.5 | $7,860 | about once every 80 years | 1 |
| Ice storm | Very Low | 1.0 | $336 | about once every 67 years | 0 |
| Coastal flooding | Not Applicable | — | — | — | — |
| Hurricane | Not Applicable | — | — | — | — |
| Tsunami | Not Applicable | — | — | — | — |
| Volcanic activity | Not Applicable | — | — | — | — |
Score: FEMA's percentile among US counties that face the hazard (higher = more risk). Expected loss: FEMA's modelled average yearly loss to buildings, people (as a statistical value) and crops. How often: FEMA's annualised frequency of the hazard in the county; for some hazards it counts event-days, so it is a rough guide, not a forecast. "Not Applicable" means FEMA does not model that hazard here.
Federal disaster declarations 10
Most common: Severe Storm 4, Flood 2, Straight-Line Winds 1, Hurricane 1.
| Decade | Declarations | Incident types |
|---|---|---|
| 1960s | 1 | Fire |
| 1970s | 1 | Flood |
| 1980s | 1 | Volcanic Eruption |
| 1990s | 3 | Severe Storm ×3 |
| 2000s | 1 | Hurricane |
| 2010s | 2 | Flood, Severe Storm |
| 2020s | 1 | Straight-Line Winds |
The last 10
Widest declarations that included Boundary County
- Hurricane Katrina (2005, EM-3244-ID): 44 Idaho counties designated.
- Severe Storms, Flooding, Mud and Landslides (1997, DR-1154-ID): 18 Idaho counties designated.
- Severe Storms, Snowmelt, Land/Mud Slides, Flooding (1997, DR-1177-ID): 12 Idaho counties designated.
Named storms in its declarations: Hurricane Katrina (2005).
Not counted above: 2 COVID-19 ("Biological") declarations — in 2020 every US county was included. Idaho also had 8 statewide declarations with no county list.
Tornado record since 1950 0
No tornado in NOAA's Storm Prediction Center record touched Boundary County between 1950 and 2025. That does not mean one cannot happen.
How Boundary County compares with its 5 nearest counties
| County | Distance | Overall risk | Score | Top hazard |
|---|---|---|---|---|
| Boundary County (this page) | — | Very Low | 26.1 | Landslide |
| Bonner County | 53 km | Relatively Low | 77.3 | Avalanche |
| Pend Oreille County, WA | 65 km | Very Low | 28.0 | Landslide |
| Lincoln County, MT | 82 km | Relatively Low | 64.3 | Wildfire |
| Stevens County, WA | 110 km | Relatively Low | 60.3 | Wildfire |
| Kootenai County | 123 km | Relatively Low | 79.0 | Landslide |
Nearest by distance between county centres. Every county in Idaho, ranked.
Vulnerability and resilience
| Social vulnerability | Relatively High 65.1 |
|---|---|
| Community resilience | Very Low 5.2 |
| Community risk factor | 1.33 |
| Expected annual loss, all hazards | $6.8 million |
FEMA scales expected losses up where social vulnerability is high (people who may find it harder to prepare, evacuate or recover) and down where community resilience is high. A factor above 1 raises the risk score. For social vulnerability a high rating is worse; for resilience a high rating is better.
Prepare for Boundary County's main hazards
- Right now: National Weather Service alerts for Idaho · all official warnings on Global Incident Tracker.
- Landslide: Landslides recorded
- Avalanche: Official warnings now
- Wildfire: US wildfires now · Wildfire smoke: what protects you
- Your property's flood zone: FEMA Flood Map Service Center ↗ — this page cannot tell you that.
- Official preparedness guidance: Ready.gov ↗ and your county emergency management office.
What this page shows, and what it misses
FEMA's National Risk Index rates a whole county against every other US county; it is a planning-level estimate for nationwide comparison, not a flood-zone map and not a substitute for a local risk assessment or the risk to one home. Declarations are presidential disaster, emergency and fire management declarations that named this county; state declarations and SBA or USDA designations are not included. Tornadoes are counted when the county is one of up to four listed on the track; 670 tornadoes that crossed a state line carry no county list in NOAA's file and are left out.
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties - v1.20.0 (December 2025). Retrieved from https://services.arcgis.com/XG15cJAlne2vxtgt/ArcGIS/rest/services/National_Risk_Index_Counties/FeatureServer/0/query on November 2, 2026, 1:20 PM EST. This product uses the Federal Emergency Management Agency’s National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Federal Emergency Management Agency (FEMA), OpenFEMA Dataset: Disaster Declarations Summaries - v2, retrieved from https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries on November 2, 2026, 1:21 PM EST. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Tornado records: NOAA/NWS Storm Prediction Center, Severe Weather Database, tornadoes 1950–2025 (https://www.spc.noaa.gov/wcm/data/1950-2025_actual_tornadoes.csv, downloaded 2 November 2026). Public domain; not endorsed by NOAA. Compiled by Global Incident Tracker.
Questions about Boundary County
What natural disasters is Boundary County, Idaho most at risk from?
Boundary County, Idaho has a Very Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 26.1 out of 100, higher than about 26% of US counties, with landslides, avalanches and wildfires scoring highest of its 18 hazards and $6.8 million a year in expected losses.
How many federal disaster declarations has Boundary County had?
OpenFEMA lists 10 federal disaster declarations that included Boundary County since 1967, not counting 2 for COVID-19; the latest is DR-4905-ID (Straight-Line Winds, declared 7 April 2026). Another 8 Idaho declarations were made statewide without a county list.
How many tornadoes have hit Boundary County?
NOAA's Storm Prediction Center has no tornado on record touching Boundary County from 1950 to 2025.
Is the National Risk Index a flood zone map?
No. The National Risk Index is a planning-level estimate for a whole county, built for nationwide comparison. It does not tell you the flood zone or the risk of a single property: for that, look up the address on FEMA's Flood Map Service Center (msc.fema.gov) and ask your local floodplain manager.