Calhoun County, Michigan Natural Disaster Risk
FEMA National Risk Index assessment · MI
LowComposite Risk Score
National percentile: 75th
Calhoun County faces low composite natural disaster risk (NRI Risk Index score 74.5, 75th national percentile), driven primarily by strong wind and hail exposure. Expected annual loss across all 18 hazard types is $35M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Risk Overview
Calhoun County carries a low composite natural disaster risk, with a National Risk Index score of 74.5 out of 100 — placing it in the 75th national percentile and below the national average for natural-disaster risk. The score blends Expected Annual Loss, Social Vulnerability, and Community Resilience across all 18 FEMA hazard types.
The county's risk is driven primarily by strong wind (damaging straight-line winds outside of tornadoes and hurricanes) at High risk — $4M in expected annual loss and about 4.89 events per year; hail (ice stones from severe thunderstorms that damage property and crops) at Medium risk — $2M in expected annual loss and about 2.55 events per year; and tornado (violently rotating columns of air capable of catastrophic local damage) at Medium risk — $7M in expected annual loss and about 0.35 events per year. Across all hazards, FEMA estimates $35M in expected annual loss for a population of 134K.
Beyond physical exposure, Calhoun County has a 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.
History supports the rating: Calhoun County has received 9 federal disaster declarations since 1972, including 3 for snowstorm events and 2 for biological events. The most recent was Covid-19 Pandemic (biological), declared in March 2020.
Among 83 Michigan counties, Calhoun County ranks #16 for overall natural disaster risk.
Top Hazards
All 18 Hazard Risks
| Strong Wind | High | 4.89 / yr | $4M |
| Hail | Medium | 2.55 / yr | $2M |
| Tornado | Medium | 0.35 / yr | $7M |
| Riverine Flood | Medium | 0.39 / yr | $17M |
| Cold Wave | Medium | 2.26 / yr | $3M |
| Ice Storm | Medium | 1.72 / yr | $248K |
| Winter Weather | Medium | 18.42 / yr | $127K |
| Earthquake | Low | 0.00 / yr | $689K |
| Landslide | Very Low | 0.17 / yr | $3K |
| Lightning | Low | 36.32 / yr | $275K |
| Heat Wave | Low | 2.68 / yr | $398K |
| Hurricane | Very Low | 0.01 / yr | $26K |
| Wildfire | Very Low | 0.00 / yr | $13K |
| 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
Calhoun County has received 9 federal disaster declarations since 1972, most recently Covid-19 Pandemic in March 2020. Most frequent causes: Snowstorm (3), Biological (2), Flood (2).
| Declared | Type | Disaster |
|---|---|---|
| March 2020 | Biological | Covid-19 Pandemic |
| March 2020 | Biological | Covid-19 |
| September 2005 | Hurricane | Hurricane Katrina Evacuation |
| September 2003 | Other | Power Outage |
| January 2001 | Snowstorm | Snow |
| September 1980 | Flood | Severe Storms & Flooding |
| January 1978 | Snowstorm | Blizzards & Snowstorms |
| April 1975 | Flood | Severe Storms, High Winds & Flooding |
| April 1972 | Snowstorm | Severe Storm & Freezing |
Source: FEMA Disaster Declarations Summaries (OpenFEMA).
Frequently Asked Questions
What is the overall natural disaster risk for Calhoun County?
Calhoun County has a composite FEMA National Risk Index score of 74.5 out of 100, placing it in the Low category and the 75th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Calhoun County?
The three highest-rated hazards are Strong Wind (High, $4M EAL), Hail (Medium, $2M EAL), Tornado (Medium, $7M EAL). These account for most of the county's expected annual losses.
How does Calhoun County compare to other Michigan counties?
Calhoun County ranks #16 of 83 Michigan counties for overall natural disaster risk, with a low rating.
How many federally declared disasters has Calhoun County had?
FEMA records 9 federal disaster declarations for Calhoun County since 1972, most often 3 for snowstorm events and 2 for biological 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. Calhoun County's $35M EAL is a statistical average, not a guarantee for any specific year or address.