Oakland County, Michigan Natural Disaster Risk
FEMA National Risk Index assessment · MI
HighComposite Risk Score
National percentile: 98th
Oakland County faces high composite natural disaster risk (NRI Risk Index score 97.5, 98th national percentile), driven primarily by tornado and ice storm exposure. Expected annual loss across all 18 hazard types is $359M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Risk Overview
FEMA's National Risk Index rates Oakland County at high composite risk, with a National Risk Index score of 97.5 out of 100 — placing it in the 98th national percentile and in the upper tier of natural-disaster risk nationally. The score blends Expected Annual Loss, Social Vulnerability, and Community Resilience across all 18 FEMA hazard types.
Most of Oakland County's expected losses come from tornado (violently rotating columns of air capable of catastrophic local damage) at Very High risk — $102M in expected annual loss and about 0.39 events per year; ice storm (freezing rain that coats surfaces in heavy, damaging ice) at Very High risk — $6M in expected annual loss and about 1.81 events per year; and cold wave (prolonged spells of dangerously low temperatures) at Very High risk — $55M in expected annual loss and about 2.63 events per year. Across all hazards, FEMA estimates $359M in expected annual loss for a population of 1.27M.
Beyond physical exposure, Oakland County has a very low social vulnerability rating (how susceptible the population is to harm) and a very high community resilience rating (its capacity to prepare for and recover from disasters). A less vulnerable population paired with strong resilience helps the community absorb and recover from events.
The county's disaster history tells the same story: Oakland County has received 15 federal disaster declarations since 1975, including 5 for severe storm events and 3 for flood events. The most recent was Severe Storms, Tornadoes, and Flooding (flood), declared in February 2024.
Among 83 Michigan counties, Oakland County ranks #2 for overall natural disaster risk.
Top Hazards
All 18 Hazard Risks
| Tornado | Very High | 0.39 / yr | $102M |
| Ice Storm | Very High | 1.81 / yr | $6M |
| Cold Wave | Very High | 2.63 / yr | $55M |
| Strong Wind | Very High | 5.46 / yr | $9M |
| Riverine Flood | High | 1.07 / yr | $165M |
| Heat Wave | High | 4.21 / yr | $13M |
| Hail | Medium | 2.77 / yr | $3M |
| Winter Weather | High | 11.84 / yr | $557K |
| Earthquake | Low | 0.00 / yr | $4M |
| Lightning | High | 34.76 / yr | $1M |
| Landslide | Low | 0.27 / yr | $16K |
| Wildfire | Very Low | 0.00 / yr | $93K |
| Hurricane | Very Low | 0.01 / yr | $99K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Drought | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Disaster History
Oakland County has received 15 federal disaster declarations since 1975, most recently Severe Storms, Tornadoes, and Flooding in February 2024. Most frequent causes: Severe Storm (5), Flood (3), Snowstorm (3).
| Declared | Type | Disaster |
|---|---|---|
| February 2024 | Flood | Severe Storms, Tornadoes, and Flooding |
| July 2021 | Severe Storm | Severe Storms, Flooding, and Tornadoes |
| March 2020 | Biological | Covid-19 Pandemic |
| March 2020 | Biological | Covid-19 |
| September 2014 | Flood | Severe Storms and Flooding |
| September 2005 | Hurricane | Hurricane Katrina Evacuation |
| June 2004 | Severe Storm | Severe Storms, Tornadoes, and Flooding |
| September 2003 | Other | Power Outage |
| January 2001 | Snowstorm | Snow |
| October 2000 | Severe Storm | Severe Storms and Flooding |
Showing the 10 most recent of 15 declarations.
Source: FEMA Disaster Declarations Summaries (OpenFEMA).
Frequently Asked Questions
What is the overall natural disaster risk for Oakland County?
Oakland County has a composite FEMA National Risk Index score of 97.5 out of 100, placing it in the High category and the 98th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Oakland County?
The three highest-rated hazards are Tornado (Very High, $102M EAL), Ice Storm (Very High, $6M EAL), Cold Wave (Very High, $55M EAL). These account for most of the county's expected annual losses.
How does Oakland County compare to other Michigan counties?
Oakland County ranks #2 of 83 Michigan counties for overall natural disaster risk, with a high rating.
How many federally declared disasters has Oakland County had?
FEMA records 15 federal disaster declarations for Oakland County since 1975, most often 5 for severe storm events and 3 for flood events. The most recent was Severe Storms, Tornadoes, and Flooding, declared in February 2024.
What does Expected Annual Loss (EAL) mean?
EAL is FEMA's estimate of average annual dollar losses from natural hazards, calculated from historical event data and exposure models. Oakland County's $359M EAL is a statistical average, not a guarantee for any specific year or address.