Roane County
Tennessee — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 69th
Roane County faces low composite natural disaster risk (NRI Risk Index score 69.0, 69th national percentile), driven primarily by landslide and cold wave exposure. Expected annual loss across all 18 hazard types is $22M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Landslide | Medium | 1.42 / yr | $65K |
| Cold Wave | Medium | 0.58 / yr | $5M |
| Earthquake | Low | 0.00 / yr | $2M |
| Strong Wind | Medium | 5.10 / yr | $1M |
| Lightning | Medium | 59.27 / yr | $534K |
| Tornado | Medium | 0.16 / yr | $2M |
| Winter Weather | Medium | 4.42 / yr | $102K |
| Riverine Flood | Low | 1.25 / yr | $10M |
| Ice Storm | Medium | 0.57 / yr | $112K |
| Hurricane | Very Low | 0.02 / yr | $50K |
| Wildfire | Very Low | 0.00 / yr | $32K |
| Heat Wave | Very Low | 0.89 / yr | $103K |
| Drought | Very Low | 20.41 / yr | $13K |
| Hail | Very Low | 3.04 / yr | $42K |
| 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 Roane County?
Roane County has a composite FEMA National Risk Index score of 69.0 out of 100, placing it in the Low category and the 69th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Roane County?
The three highest-rated hazards are Landslide (Medium, $65K EAL), Cold Wave (Medium, $5M EAL), Earthquake (Low, $2M EAL). These account for most of the county's expected annual losses.
How does Roane County compare to other Tennessee counties?
Roane County ranks #29 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. Roane County's $22M EAL is a statistical average, not a guarantee for any specific year or address.