Delaware natural disaster risk
Delaware ranks #44 of 51 from the lowest population-weighted county-score mean in our state comparison. Its highest hazard-score means are winter weather, cold wave, riverine flooding.
RelocateMath computes these state means by weighting FEMA county scores by population. A mean of county percentiles is not a national state percentile or an official FEMA state rating.
The vertical line marks county-score scale midpoint (50).
Find your county's risk in Delaware
All 3 county rows with a FEMA score are available below, initially ordered by population.
| County | Population | Risk score | FEMA rating |
|---|---|---|---|
| New Castle County | 577,961 | 95.3 | Relatively High |
| Sussex County | 255,626 | 94.1 | Relatively Moderate |
| Kent County | 187,604 | 84.5 | Relatively Moderate |
The county rows show FEMA's own county percentile scores and rating categories; the state figures above are our weighted means. County data cannot establish a property's safety. Expected loss is modeled annual loss per resident, not a premium quote. The insurance figure is what owners with a mortgage reported paying in 2024 (Census American Community Survey), not a current quote. For a specific home, check the address on FEMA's flood map and get insurance quotes before you commit. Our guide explains how to check natural disaster risk before you move.
Lowest FEMA county risk scores in Delaware
- Kent County 84.5
- Sussex County 94.1
- New Castle County 95.3
Cities in Delaware
- Philadelphia, PA county-score mean 94.5
Frequently asked questions
Is Delaware safe from natural disasters?
Delaware's population-weighted county-score mean is 93 out of 100 (very high county-score mean), #44 of 51 from the lowest mean in our state comparison. A state average cannot show whether an individual home is safe. About 58% of residents live in counties FEMA rates relatively high or very high.
What natural disasters happen in Delaware?
The highest population-weighted county hazard-score means in Delaware are winter weather, cold wave, riverine flooding (means 98, 95, 94 on the 0–100 county-score scale). These are not national state percentiles.
Which counties have the lowest modeled risk scores in Delaware?
Among counties with at least 20,000 people, the lowest FEMA county risk scores are in Kent County, Sussex County, New Castle County. Conditions vary within each county; check an individual address separately.