McNairy County
Tennessee — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 51th
McNairy County faces low composite natural disaster risk (NRI Risk Index score 50.5, 51th national percentile), driven primarily by earthquake and cold wave exposure. Expected annual loss across all 18 hazard types is $15M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Earthquake | Medium | 0.01 / yr | $5M |
| Cold Wave | Medium | 1.58 / yr | $3M |
| Landslide | Low | 1.19 / yr | $8K |
| Heat Wave | Low | 14.58 / yr | $704K |
| Strong Wind | Medium | 2.21 / yr | $709K |
| Tornado | Low | 0.38 / yr | $2M |
| Hurricane | Very Low | 0.05 / yr | $135K |
| Lightning | Low | 59.80 / yr | $188K |
| Drought | Low | 12.60 / yr | $65K |
| Riverine Flood | Very Low | 0.86 / yr | $3M |
| Ice Storm | Low | 0.63 / yr | $24K |
| Wildfire | Very Low | 0.00 / yr | $10K |
| Hail | Very Low | 3.25 / yr | $55K |
| Winter Weather | Very Low | 5.16 / yr | $13K |
| 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 McNairy County?
McNairy County has a composite FEMA National Risk Index score of 50.5 out of 100, placing it in the Low category and the 51th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in McNairy County?
The three highest-rated hazards are Earthquake (Medium, $5M EAL), Cold Wave (Medium, $3M EAL), Landslide (Low, $8K EAL). These account for most of the county's expected annual losses.
How does McNairy County compare to other Tennessee counties?
McNairy County ranks #53 of 95 Tennessee 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. McNairy County's $15M EAL is a statistical average, not a guarantee for any specific year or address.