FEMA rates relative heat wave risk for Yellowstone County as relatively moderate and reports FEMA annualized frequency of 0.743 per year for the area.
FEMA summary
FEMA's profile for Yellowstone County reports FEMA annualized frequency of 0.743 per year for heat wave. FEMA's relative risk rating for the area is relatively moderate; the annualized frequency is a separate measure.
Hazard metrics cover FEMA county-equivalent geographies rather than individual addresses or parcels. Use local or state hazard maps before making a property, insurance, retrofit, or evacuation decision.
Select a hazard to inspect FEMA's figures for Yellowstone County.
Heat Wave
FEMA combines its area-wide loss estimate and community data in this relative rating. Event frequency appears separately below.
Relative FEMA score
94.0/100
Occurrence thresholds vary by hazard. The FEMA methodology defines the value for each hazard.
The area loss estimate combines FEMA's modeled losses to buildings, population, and agriculture across Yellowstone County. It is not an estimate for a home or address.
City risk summary
For Billings, FEMA rates heat wave risk for Yellowstone County as relatively moderate, with a relative score of 94.0/100. The next highest relative scores are hail at 92.2/100 and lightning at 90.4/100.
Using FEMA data for Yellowstone County, Billings is #1 among 2 covered Montana entries for heat wave risk.
For homeowners and movers
Preparedness actions
Living in Billings? Learn how to handle water storage, sanitation, and security in a small space.
The map shows Billings. All FEMA figures on this page cover Yellowstone County.
The FEMA figures cover Yellowstone County. Address-level conditions require local maps, building records, and property details.
FEMA rates relative heat wave risk for Yellowstone County as relatively moderate. Its FEMA annualized frequency is 0.743 per year. Damage at a specific address also depends on the building, soil, elevation, and exact hazard zone.
Among 2 Montana cities covered by this directory, Billings is #1 for relative heat wave risk based on FEMA's score for Yellowstone County. Homes within Billings can have different soil, elevation, construction, and hazard-zone conditions.
In FEMA's data for Yellowstone County, the highest relative ratings are Heat Wave (Relatively Moderate), Hail (Relatively Moderate), and Lightning (Relatively High). FEMA uses estimated losses and community data along with event frequency when assigning these ratings.
The hazard numbers cover Yellowstone County. For an individual home, check local fault, flood, fire, evacuation, and building records for the exact address.
FEMA gives Yellowstone County an overall relative risk rating of relatively low. Conditions at a specific home depend on its hazard zones, building type, maintenance, insurance, and access to evacuation routes and emergency services.
Start with this step: Confirm the exact hazard using official local maps before making property or insurance decisions. Know how local officials issue warnings and evacuation instructions. Use Ready.gov Be Informed and local emergency guidance for a complete plan.
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View productHazard metrics come from FEMA National Risk Index v1.19.0 (March 2023). City population and coordinates come from SimpleMaps US Cities Database. For current conditions, use official local maps, warnings, inspections, and professional advice.