Alert USA
weather NWS severe New Castle, DE; Chester, PA; Delaware, PA July 9, 2026 at 9:29 PM

Flash Flood Warning

At 529 PM EDT, emergency management reported flash flooding occurring in Hockessin. Between 1 and 3 inches of rain have fallen. The expected rainfall rate is 1 to 3 inches in 1 hour. Additional rainfall amounts of 1 to 3 inches are possible in the warned area. Flash flooding is already occurring.

HAZARD...Life threatening flash flooding caused by thunderstorms.

SOURCE...Emergency management reported.

IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, street

Flooding in New Castle, DE; Chester, PA; Delaware, PA can cut off roads with little warning, damage homes near low-lying areas, and disrupt power and water service. Even a few inches of moving water can carry away a vehicle.

This report is based on information from NWS, monitored by Alert USA's verified emergency feed.

Alert USA anticipates a high chance of travel disruptions, elevated property risk in low-lying areas, and possible power outages while the event is active.

Recommended steps: avoid flooded roads — turn around, don't drown; move to higher ground if you are in a low-lying area; charge phones and prepare for power loss; check on family and neighbors.

Alert USA is tracking this flood event and will update this report as verified information becomes available.

Verified by Alert USA • NWS

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