Genesee County, Michigan Natural Disaster Risk
FEMA National Risk Index assessment · MI
MediumComposite Risk Score
National percentile: 92th
Genesee County faces medium composite natural disaster risk (NRI Risk Index score 92.2, 92th national percentile), driven primarily by tornado and cold wave exposure. Expected annual loss across all 18 hazard types is $113M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Risk Overview
Genesee County carries a medium composite natural disaster risk, with a National Risk Index score of 92.2 out of 100 — placing it in the 92nd national percentile and near the national midpoint for natural-disaster risk. The score blends Expected Annual Loss, Social Vulnerability, and Community Resilience across all 18 FEMA hazard types.
Risk here concentrates in tornado (violently rotating columns of air capable of catastrophic local damage) at High risk — $29M in expected annual loss and about 0.29 events per year; cold wave (prolonged spells of dangerously low temperatures) at High risk — $21M in expected annual loss and about 2.84 events per year; and strong wind (damaging straight-line winds outside of tornadoes and hurricanes) at High risk — $5M in expected annual loss and about 5.57 events per year. Across all hazards, FEMA estimates $113M in expected annual loss for a population of 406K.
Beyond physical exposure, Genesee County has a medium social vulnerability rating (how susceptible the population is to harm) and a 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.
History supports the rating: Genesee County has received 14 federal disaster declarations since 1975, including 4 for flood events and 3 for severe storm events. The most recent was Covid-19 Pandemic (biological), declared in March 2020.
Among 83 Michigan counties, Genesee County ranks #4 for overall natural disaster risk.
Top Hazards
All 18 Hazard Risks
| Tornado | High | 0.29 / yr | $29M |
| Cold Wave | High | 2.84 / yr | $21M |
| Strong Wind | High | 5.57 / yr | $5M |
| Riverine Flood | Medium | 0.93 / yr | $51M |
| Hail | Medium | 2.79 / yr | $2M |
| Ice Storm | High | 1.25 / yr | $862K |
| Lightning | High | 32.69 / yr | $1M |
| Heat Wave | Medium | 2.63 / yr | $2M |
| Earthquake | Low | 0.00 / yr | $815K |
| Winter Weather | Low | 11.42 / yr | $85K |
| Landslide | Very Low | 0.11 / yr | $2K |
| Hurricane | Very Low | 0.01 / yr | $46K |
| Wildfire | Very Low | 0.00 / yr | $11K |
| 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
Genesee County has received 14 federal disaster declarations since 1975, most recently Covid-19 Pandemic in March 2020. Most frequent causes: Flood (4), Severe Storm (3), Biological (2).
| Declared | Type | Disaster |
|---|---|---|
| March 2020 | Biological | Covid-19 Pandemic |
| March 2020 | Biological | Covid-19 |
| January 2016 | Toxic Substances | Contaminated Water |
| September 2005 | Hurricane | Hurricane Katrina Evacuation |
| June 2004 | Severe Storm | Severe Storms, Tornadoes, and Flooding |
| September 2003 | Other | Power Outage |
| January 2001 | Snowstorm | Snow |
| July 1997 | Severe Storm | Severe Storms, Tornadoes,and Flooding |
| September 1986 | Flood | Severe Storms & Flooding |
| September 1985 | Flood | Severe Storms and Flooding |
Showing the 10 most recent of 14 declarations.
Source: FEMA Disaster Declarations Summaries (OpenFEMA).
Frequently Asked Questions
What is the overall natural disaster risk for Genesee County?
Genesee County has a composite FEMA National Risk Index score of 92.2 out of 100, placing it in the Medium category and the 92th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Genesee County?
The three highest-rated hazards are Tornado (High, $29M EAL), Cold Wave (High, $21M EAL), Strong Wind (High, $5M EAL). These account for most of the county's expected annual losses.
How does Genesee County compare to other Michigan counties?
Genesee County ranks #4 of 83 Michigan counties for overall natural disaster risk, with a medium rating.
How many federally declared disasters has Genesee County had?
FEMA records 14 federal disaster declarations for Genesee County since 1975, most often 4 for flood events and 3 for severe storm events. The most recent was Covid-19 Pandemic, declared in March 2020.
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. Genesee County's $113M EAL is a statistical average, not a guarantee for any specific year or address.