FEMA rates relative ice storm risk for Oakland County as very high and reports FEMA annualized frequency of 1.806 per year for the area.
FEMA summary
FEMA's profile for Oakland County reports FEMA annualized frequency of 1.806 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 Oakland 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 Oakland County. It is not an estimate for a home or address.
City risk summary
For South Lyon, FEMA rates ice storm risk for Oakland County as very high, with a relative score of 99.8/100. The next highest relative scores are tornado at 99.7/100 and strong wind at 99.3/100.
Using FEMA data for Oakland County, South Lyon is tied #1 among 18 covered Michigan entries for ice storm risk; 3 entries share that score. Ann Arbor is about 13 straight-line miles from the South Lyon map point; its FEMA figures cover Washtenaw County.
For homeowners and movers
Preparedness actions
Living in South Lyon? Learn how to handle water storage, sanitation, and security in a small space.
The map shows South Lyon. All FEMA figures on this page cover Oakland County.
The FEMA figures cover Oakland County. Address-level conditions require local maps, building records, and property details.
FEMA rates relative ice storm risk for Oakland County as very high. Its FEMA annualized frequency is 1.806 per year. Damage at a specific address also depends on the building, soil, elevation, and exact hazard zone.
Among 18 Michigan cities covered by this directory, South Lyon is Tied #1 for relative ice storm risk based on FEMA's score for Oakland County. 3 covered cities share this rank because they use the same FEMA geography. Homes within South Lyon can have different soil, elevation, construction, and hazard-zone conditions.
In FEMA's data for Oakland County, the highest relative ratings are Ice Storm (Very High), Tornado (Very High), and Strong Wind (Very High). FEMA uses estimated losses and community data along with event frequency when assigning these ratings.
The hazard numbers cover Oakland County. For an individual home, check local fault, flood, fire, evacuation, and building records for the exact address.
FEMA gives Oakland County an overall relative risk rating of relatively high. 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 |
|---|---|---|---|
| Ann Arbor, MI | 13 mi | Relatively Moderate | 71.1 |
| Farmington Hills, MI | 14 mi | Very High | 99.8 |
| Livonia, MI | 15 mi | Relatively Moderate | 82.8 |
| Westland, MI | 17 mi | Relatively Moderate | 82.8 |
| Dearborn, MI | 25 mi | Relatively Moderate | 82.8 |
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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.