Delaware: 3 counties covered

Across 3 Delaware counties with a FEMA flood score, the average national percentile is 92.7 — but that average hides real spread between counties, which is why each one gets its own page rather than a single statewide number.

• New Castle County — 97.6th percentile, Relatively High
• Sussex County — 97.6th percentile, Very High
• Kent County — 82.9th percentile, Relatively Moderate