Flash Flood Warning — Sussex County, Delaware
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Current Status
🌊 Active: Flash Flood Warning
Flash Flood Warning issued August 28 at 2:40PM EDT until August 28 at 5:15PM EDT by NWS Mount Holly NJ
At 240 PM EDT, the public reported thunderstorms producing heavy rain across the warned area. Between 1.5 and 3 inches of rain have fallen. The expected rainfall rate is 1 to 2 inches in 1 hour. Additional rainfall amounts up to 1 inch are possible in the warned area. Flash flooding is already occurring. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Public reported. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. Some locations that will experience flash flooding include... Georgetown, Millsboro, Lewes, Milton, Dagsboro, Millville, Henlopen Acres, Cape Henlopen State Park, Long Neck, Ocean View, Frankford and South Bethany.
Effective August 28, 2026 at 2:40 PM ET · Expires August 28, 2026 at 5:15 PM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS Mount Holly NJ
Expires
August 28, 2026 at 5:15 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.
Other Active Alerts in Delaware
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Flood Warning
Flash Flood Warning
Severe Thunderstorm Warning
Tornado Watch
Get Flash Flood Warning Alerts for Sussex County
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Frequently Asked Questions
What does a Flash Flood Warning mean for Sussex County, Delaware?
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Is this Flash Flood Warning currently active?
Yes — this alert is active as of our last check (1 minute ago). It's set to expire August 28, 2026 at 5:15 PM ET.
How do I get notified about Flash Flood Warning alerts for Sussex County?
Download StormCast free on Google Play and set Sussex 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.