Delaware Disaster Risk
Natural disaster risk data for all 3 counties.
FEMA release
December 2025
Mean county NRI score
91.3
Counties with Data
3
of 3 total
County risk atlas
Delaware hazard exposure by county
FEMA NRI v1.20 scores on a 0–100 relative scale. Toggle the composite and five selected hazard categories out of FEMA's 18. Flood is the higher of Coastal Flooding and Inland Flooding NRI scores.
Counties
3/3
Mean county NRI score
91.3
Risk layers
6
All Delaware Counties
| County | NRI score |
|---|---|
| New Castle County | 95.3 |
| Sussex County | 94.1 |
| Kent County | 84.5 |
Frequently Asked Questions
How many Delaware county records are included?
Which FEMA county ratings appear in Delaware?
How complete are the five selected hazard fields for Delaware?
Official Ready.gov resource
Continue to Ready.gov for federal emergency-planning information maintained outside RiskByCounty.
Data Source
County data sourced from FEMA National Risk Index v1.20, released December 2025. Values are labeled NRI score (0–100 relative scale). RiskByCounty displays five selected hazard categories out of FEMA's 18; flood is the higher of the Coastal Flooding and Inland Flooding source scores.
RiskByCounty presents county-level source fields and deterministic arithmetic summaries.