Coastal Flood Risk in Maryland
All Maryland 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 19 of 24 Maryland counties in FEMA's National Risk Index. Somerset County carries the state's highest coastal flood score at 93.2, with $7M in expected annual coastal flood losses.
3 Maryland counties are rated High or Very High for coastal flood, and expected annual losses from coastal flood total roughly $28M 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 | Somerset County | High | 3.67 / yr | $7M | |
| 2 | Dorchester County | High | 3.65 / yr | $6M | |
| 3 | Worcester County | High | 3.65 / yr | $5M | |
| 4 | Baltimore County | Medium | 3.69 / yr | $2M | |
| 5 | Anne Arundel County | Medium | 3.66 / yr | $2M | |
| 6 | Talbot County | Medium | 3.65 / yr | $1M | |
| 7 | Queen Anne's County | Medium | 3.65 / yr | $1M | |
| 8 | Baltimore City | Medium | 3.69 / yr | $559K | |
| 9 | St. Mary's County | Medium | 3.65 / yr | $1M | |
| 10 | Kent County | Low | 3.70 / yr | $474K | |
| 11 | Calvert County | Low | 3.65 / yr | $754K | |
| 12 | Wicomico County | Low | 3.65 / yr | $432K | |
| 13 | Cecil County | Low | 3.66 / yr | $391K | |
| 14 | Caroline County | Low | 3.66 / yr | $198K | |
| 15 | Charles County | Low | 3.66 / yr | $274K | |
| 16 | Prince George's County | Low | 3.71 / yr | $106K | |
| 17 | Harford County | Low | 3.70 / yr | $109K | |
| 18 | Howard County | Very Low | 0.01 / yr | $632 | |
| 19 | Montgomery County | Very Low | 0.01 / yr | $218 |
19 Maryland counties with measurable coastal flood risk. See the national coastal flood ranking or all Maryland counties by overall risk.
Frequently Asked Questions
Which Maryland county has the highest coastal flood risk?
Somerset County has the highest FEMA coastal flood risk score in Maryland at 93.2 (High), with $7M in expected annual losses and about 3.67 events per year.
How many Maryland counties face significant coastal flood risk?
19 Maryland counties record measurable coastal flood risk in FEMA's National Risk Index; 3 of them are rated High or Very High.