Massac County
Illinois — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 62th
Massac County faces low composite natural disaster risk (NRI Risk Index score 61.6, 62th national percentile), driven primarily by earthquake and ice storm exposure. Expected annual loss across all 18 hazard types is $19M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Earthquake | Medium | 0.01 / yr | $8M |
| Ice Storm | Medium | 1.23 / yr | $331K |
| Drought | Medium | 8.11 / yr | $639K |
| Heat Wave | Low | 10.58 / yr | $858K |
| Strong Wind | Medium | 4.02 / yr | $799K |
| Tornado | Medium | 0.21 / yr | $2M |
| Winter Weather | Medium | 6.58 / yr | $79K |
| Lightning | Low | 55.74 / yr | $202K |
| Cold Wave | Low | 1.00 / yr | $767K |
| Riverine Flood | Low | 4.21 / yr | $4M |
| Landslide | Very Low | 0.31 / yr | $645 |
| Hail | Low | 2.98 / yr | $153K |
| Hurricane | Very Low | 0.02 / yr | $13K |
| Wildfire | Very Low | 0.00 / yr | $2K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Massac County?
Massac County has a composite FEMA National Risk Index score of 61.6 out of 100, placing it in the Low category and the 62th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Massac County?
The three highest-rated hazards are Earthquake (Medium, $8M EAL), Ice Storm (Medium, $331K EAL), Drought (Medium, $639K EAL). These account for most of the county's expected annual losses.
How does Massac County compare to other Illinois counties?
Massac County ranks #44 of 102 Illinois counties for overall natural disaster risk, with a low rating.
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. Massac County's $19M EAL is a statistical average, not a guarantee for any specific year or address.