Boise, ID
Local storm history & FEMA National Risk Index data
Boise is rated Relatively Moderate for overall natural hazard risk — near the middle compared to other US counties — based on FEMA's National Risk Index for Ada County, ID. The county's highest-rated hazards are winter weather, wildfire, and heat wave.
Storm events near Boise
NOAA-recorded tornado, hail, and flood events within 25 miles of Boise's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Boise itself, not the whole county.
County-wide hazard risk
Every other hazard FEMA and NOAA track — including drought — is only scored at the county level. These are Ada County's FEMA National Risk Index scores, covering Boise along with the rest of the county, not a Boise-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 98.3 | Relatively High |
| Inland Flooding | 89.8 | Relatively Moderate |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 88.2 | Relatively Low |
| Heat Wave | 92.9 | Relatively Moderate |
| Tornado | 27 | Relatively Low |
| Avalanche | 27 | Very Low |
| Cold Wave | 51.7 | Relatively Low |
| Drought | 14.6 | Very Low |
| Hail | 54.5 | Relatively Low |
| Hurricane | — | Not Applicable |
| Ice Storm | 80.5 | Relatively Moderate |
| Landslide | 69.1 | Relatively Low |
| Lightning | 90.1 | Relatively High |
| Strong Wind | 91.8 | Relatively High |
| Tsunami | — | Not Applicable |
| Volcanic Activity | 74.3 | Very Low |
| Winter Weather | 98.9 | Very High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full Ada County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in Ada County:
More on Ada County:
Frequently asked questions
What natural hazards is Boise, ID at risk of?
Boise is rated Relatively Moderate for overall natural hazard risk by FEMA's National Risk Index — near the middle compared to other US counties. The highest-rated hazards for Ada County, where Boise is located, are winter weather, wildfire, and heat wave.
What is Boise's biggest natural hazard risk?
Winter Weather is the highest-rated hazard for Ada County, where Boise is located, scoring 98.9 out of 100 on FEMA's National Risk Index (rated "Very High").
Is Boise a high-risk area for natural disasters?
Somewhat — Boise carries near the middle compared to other US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively Moderate" for Ada County.
Has Boise had tornadoes, hail, or flooding?
NOAA has recorded 1 tornado, 12 hail, 19 inland flooding events within 25 miles of Boise since 2016.