Coastal Flood Risk in Delaware
All Delaware 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 3 of 3 Delaware counties in FEMA's National Risk Index. Sussex County carries the state's highest coastal flood score at 97.6, with $14M in expected annual coastal flood losses.
2 Delaware counties are rated High or Very High for coastal flood, and expected annual losses from coastal flood total roughly $19M 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 | Sussex County | Very High | 3.65 / yr | $14M | |
| 2 | New Castle County | High | 3.69 / yr | $4M | |
| 3 | Kent County | Medium | 3.69 / yr | $1M |
3 Delaware counties with measurable coastal flood risk. See the national coastal flood ranking or all Delaware counties by overall risk.
Frequently Asked Questions
Which Delaware county has the highest coastal flood risk?
Sussex County has the highest FEMA coastal flood risk score in Delaware at 97.6 (Very High), with $14M in expected annual losses and about 3.65 events per year.
How many Delaware counties face significant coastal flood risk?
3 Delaware counties record measurable coastal flood risk in FEMA's National Risk Index; 2 of them are rated High or Very High.