Landslide Risk in Delaware
All Delaware counties ranked by FEMA National Risk Index landslide score
Landslide risk — downhill movement of rock, soil, and debris on unstable slopes — is rated for 3 of 3 Delaware counties in FEMA's National Risk Index. New Castle County carries the state's highest landslide score at 76.6, with $12K in expected annual landslide losses.
No Delaware county reaches the High band for landslide, and expected annual losses from landslide total roughly $13K statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Landslide
| # | County | Landslide Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | New Castle County | Low | 0.14 / yr | $12K | |
| 2 | Sussex County | Very Low | 0.13 / yr | $1K | |
| 3 | Kent County | Very Low | 0.08 / yr | $330 |
3 Delaware counties with measurable landslide risk. See the national landslide ranking or all Delaware counties by overall risk.
Frequently Asked Questions
Which Delaware county has the highest landslide risk?
New Castle County has the highest FEMA landslide risk score in Delaware at 76.6 (Low), with $12K in expected annual losses and about 0.14 events per year.
How many Delaware counties face significant landslide risk?
3 Delaware counties record measurable landslide risk in FEMA's National Risk Index; 0 of them are rated High or Very High.