Coastal Flood Risk in Connecticut
All Connecticut counties ranked by FEMA National Risk Index coastal flood score
Coastal Flood risk — seawater inundation from storm surge, high tides, and rising sea levels — is rated for 7 of 9 Connecticut counties in FEMA's National Risk Index. Greater Bridgeport Planning Region carries the state's highest coastal flood score at 94.8, with $11M in expected annual coastal flood losses.
3 Connecticut counties are rated High or Very High for coastal flood, and expected annual losses from coastal flood total roughly $31M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Coastal Flood
| # | County | Coastal Flood Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Greater Bridgeport Planning Region | Very High | 6.16 / yr | $11M | |
| 2 | South Central Connecticut Planning Region | High | 4.96 / yr | $9M | |
| 3 | Western Connecticut Planning Region | High | 6.16 / yr | $7M | |
| 4 | Lower Connecticut River Valley Planning Region | Medium | 3.76 / yr | $3M | |
| 5 | Southeastern Connecticut Planning Region | Medium | 3.72 / yr | $1M | |
| 6 | Naugatuck Valley Planning Region | Very Low | 6.16 / yr | $27K | |
| 7 | Capitol Planning Region | Very Low | 3.69 / yr | $14K |
7 Connecticut counties with measurable coastal flood risk. See the national coastal flood ranking or all Connecticut counties by overall risk.
Frequently Asked Questions
Which Connecticut county has the highest coastal flood risk?
Greater Bridgeport Planning Region has the highest FEMA coastal flood risk score in Connecticut at 94.8 (Very High), with $11M in expected annual losses and about 6.16 events per year.
How many Connecticut counties face significant coastal flood risk?
7 Connecticut counties record measurable coastal flood risk in FEMA's National Risk Index; 3 of them are rated High or Very High.