Flood Warning — New Castle County, Delaware
Flooding is occurring or imminent along rivers, streams, or low-lying areas.
Current Status
🌊 Active: Flood Warning
Flood Warning issued August 27 at 3:26PM EDT until August 27 at 7:15PM EDT by NWS Mount Holly NJ
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Northeastern New Castle County in northern Delaware... Northwestern Gloucester County in southern New Jersey... Northwestern Salem County in southern New Jersey... Southern Delaware County in southeastern Pennsylvania... * WHEN...Until 715 PM EDT. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - At 325 PM EDT, Doppler radar indicated heavy rain due to thunderstorms. Flooding is ongoing or expected to begin shortly in the warned area. Between 2 and 3 inches of rain have fallen. - Some locations that will experience flooding include... Wilmington, Chester, Folcroft, Swarthmore, Elsmere, Arden, Chelsea, Chester Township, Concordville, Elam and Nether Providence Township. - http://www.weather.gov/safety/flood
Effective August 27, 2026 at 3:26 PM ET · Expires August 27, 2026 at 7:15 PM ET
Event Details
Event Type
Flood Warning
Severity
severe
Issued By
NWS Mount Holly NJ
Expires
August 27, 2026 at 7:15 PM ET
Last Checked
1 minute ago
What To Do
📋 Official NWS Guidance
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Also In Effect For
This same Flood Warning also covers:
Other Active Alerts in Delaware
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Flash Flood Warning
Severe Thunderstorm Warning
Tornado Watch
Flash Flood Warning
Get Flood Warning Alerts for New Castle County
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Frequently Asked Questions
What does a Flood Warning mean for New Castle County, Delaware?
Flooding is occurring or imminent along rivers, streams, or low-lying areas.
Is this Flood Warning currently active?
Yes — this alert is active as of our last check (1 minute ago). It's set to expire August 27, 2026 at 7:15 PM ET.
How do I get notified about Flood Warning alerts for New Castle County?
Download StormCast free on Google Play and set New Castle County, Delaware as one of your monitored locations. StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
What other areas does this alert cover?
This same Flood Warning is also in effect for Gloucester County, Delaware County, Salem County.