Based on NOAA Storm Events Database records from 1996 to 2025, these are the Delaware counties with the most recorded flood events. New Castle County tops the list with 227 events. The data includes river floods, flash floods, coastal flooding, and hurricane-related flooding.
| Rank | County | Total Events | River Floods | Flash Floods |
|---|---|---|---|---|
| 1 | New Castle County | 227 | 71 | 156 |
| 2 | Sussex County | 100 | 32 | 68 |
| 3 | Kent County | 48 | 18 | 30 |
Source: NOAA Storm Events Database (1996–2025).
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