Coastal Flood Risk in Pennsylvania
All Pennsylvania 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 4 of 67 Pennsylvania counties in FEMA's National Risk Index. Philadelphia County carries the state's highest coastal flood score at 85.4, with $3M in expected annual coastal flood losses.
1 Pennsylvania county is rated High or Very High for coastal flood, and expected annual losses from coastal flood total roughly $4M 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 | Philadelphia County | High | 3.69 / yr | $3M | |
| 2 | Bucks County | Medium | 6.16 / yr | $922K | |
| 3 | Delaware County | Medium | 3.69 / yr | $730K | |
| 4 | Erie County | Very Low | 0.02 / yr | $8K |
4 Pennsylvania counties with measurable coastal flood risk. See the national coastal flood ranking or all Pennsylvania counties by overall risk.
Frequently Asked Questions
Which Pennsylvania county has the highest coastal flood risk?
Philadelphia County has the highest FEMA coastal flood risk score in Pennsylvania at 85.4 (High), with $3M in expected annual losses and about 3.69 events per year.
How many Pennsylvania counties face significant coastal flood risk?
4 Pennsylvania counties record measurable coastal flood risk in FEMA's National Risk Index; 1 of them are rated High or Very High.