FEMA rates relative ice storm risk for Boone County as very high and reports FEMA annualized frequency of 1.078 per year for the area.
FEMA summary
FEMA's profile for Boone County reports FEMA annualized frequency of 1.078 per year for ice storm. FEMA's relative risk rating for the area is very high; 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 Boone County.
Ice Storm
FEMA combines its area-wide loss estimate and community data in this relative rating. Event frequency appears separately below.
Relative FEMA score
99.8/100
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 Boone County. It is not an estimate for a home or address.
City risk summary
For Columbia, FEMA rates ice storm risk for Boone County as very high, with a relative score of 99.8/100. The next highest relative scores are heat wave at 97.8/100 and tornado at 93.8/100.
Using FEMA data for Boone County, Columbia is #2 among 8 covered Missouri entries for ice storm risk. O'Fallon is about 87 straight-line miles from the Columbia map point; its FEMA figures cover St. Charles County.
For homeowners and movers
Preparedness actions
Living in Columbia? Learn how to handle water storage, sanitation, and security in a small space.
The map shows Columbia. All FEMA figures on this page cover Boone County.
The FEMA figures cover Boone County. Address-level conditions require local maps, building records, and property details.
FEMA rates relative ice storm risk for Boone County as very high. Its FEMA annualized frequency is 1.078 per year. Damage at a specific address also depends on the building, soil, elevation, and exact hazard zone.
Among 8 Missouri cities covered by this directory, Columbia is #2 for relative ice storm risk based on FEMA's score for Boone County. Homes within Columbia can have different soil, elevation, construction, and hazard-zone conditions.
In FEMA's data for Boone County, the highest relative ratings are Ice Storm (Very High), Heat Wave (Relatively High), and Tornado (Relatively High). FEMA uses estimated losses and community data along with event frequency when assigning these ratings.
The hazard numbers cover Boone County. For an individual home, check local fault, flood, fire, evacuation, and building records for the exact address.
FEMA gives Boone County an overall relative risk rating of relatively moderate. 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.
Distances are measured between city coordinates.
| City | Distance | Ice Storm rating | Relative score |
|---|---|---|---|
| O'Fallon, MO | 87 mi | Very High | 98.2 |
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Hazard 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.