Lower Connecticut River Valley Planning Region
Connecticut — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 84th
Lower Connecticut River Valley Planning Region faces medium composite natural disaster risk (NRI Risk Index score 83.8, 84th national percentile), driven primarily by riverine flood and hurricane exposure. Expected annual loss across all 18 hazard types is $63M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Riverine Flood | Medium | 2.25 / yr | $49M |
| Hurricane | Medium | 0.20 / yr | $7M |
| Coastal Flood | Medium | 3.76 / yr | $3M |
| Earthquake | Low | 0.00 / yr | $1M |
| Ice Storm | Medium | 1.67 / yr | $309K |
| Landslide | Low | 0.39 / yr | $9K |
| Winter Weather | Medium | 13.25 / yr | $131K |
| Lightning | Medium | 24.98 / yr | $395K |
| Strong Wind | Medium | 2.34 / yr | $739K |
| Wildfire | Very Low | 0.00 / yr | $39K |
| Tornado | Low | 0.14 / yr | $1M |
| Heat Wave | Low | 4.90 / yr | $311K |
| Drought | Low | 0.73 / yr | $51K |
| Cold Wave | Low | 0.92 / yr | $525K |
| Hail | Very Low | 1.80 / yr | $44K |
| Avalanche | 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 Lower Connecticut River Valley Planning Region?
Lower Connecticut River Valley Planning Region has a composite FEMA National Risk Index score of 83.8 out of 100, placing it in the Medium category and the 84th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Lower Connecticut River Valley Planning Region?
The three highest-rated hazards are Riverine Flood (Medium, $49M EAL), Hurricane (Medium, $7M EAL), Coastal Flood (Medium, $3M EAL). These account for most of the county's expected annual losses.
How does Lower Connecticut River Valley Planning Region compare to other Connecticut counties?
Lower Connecticut River Valley Planning Region ranks #7 of 9 Connecticut counties for overall natural disaster risk, with a medium 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. Lower Connecticut River Valley Planning Region's $63M EAL is a statistical average, not a guarantee for any specific year or address.