WILMINGTON, Del. – A strong coastal storm is sending waves of rain and tidal flooding across Delaware’s shoreline Sunday into Monday, leaving roadways like I-95 and Route 9 slick and at times impassable. One to two feet of tidal inundation may linger near Delaware Bay and the Christina River through Monday evening as residents return from the Columbus Day holiday.
According to the National Weather Service in Mount Holly, a Coastal Flood Warning remains in effect until 9 p.m. Monday for New Castle, Kent, and Salem Counties. Moderate flooding has already been reported in low-lying neighborhoods from New Castle to Reedy Point. Motorists are urged to avoid flooded roads—just a foot of moving water can sweep vehicles away. Commuters along I-495 and U.S. 13 should plan extra travel time.
The storm’s winds will shift northwest late Monday, drawing in a crisp, drier airmass that ushers in a true taste of fall. Highs will dip into the 60s by Tuesday, with clear skies and mild breezes returning midweek—welcome news for parents sending kids back to school and those planning late-season pumpkin patch visits or leaf-viewing drives.
Officials urge residents to keep phones charged, secure outdoor decorations, and check local tide updates before heading near the coast. Conditions calm by Tuesday, but cooler, more typical October weather will dominate through next weekend.
Five-Day Forecast for Wilmington, DE:
Sun: 65/56 – Rain and breezy; coastal flood impacts likely near Delaware Bay.
Mon: 61/56 – Periods of rain; lingering coastal flooding, easing by night.
Tue: 70/55 – Clearing; drier and cooler with fall air returning.
Wed: 67/44 – Sunny, crisp; pleasant for outdoor events.
Thu: 68/45 – Bright and mild; perfect for fall activities.
