This event is no longer active — it's kept here as a record. Recovery may still be underway; the guidance below applies.
Part of: Greater Bridgeport Planning Region Area Flooding — July 2026 →
Flash Flood Warning issued July 21 at 4:38PM EDT until July 21 at 8:45PM EDT by NWS Mount Holly NJ
This is a severe-significance flash flood warning event affecting New Castle, DE; Burlington, NJ; Camden, NJ; Gloucester, NJ; Salem, NJ; Chester, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA, tracked from official feeds (NOAA / National Weather Service). We update this page as the situation develops.
- Type
- Flash Flood Warning
- Extent
- ≈ 551,932 acres
- Began
- To end
Hazard details
- Flash-flood damage threat
- CONSIDERABLE
Damage signals as reported by NOAA / National Weather Service — verbatim, not an estimate.
Affected by this event? Open your area's damage guides below to reach a vetted local restoration pro, 24/7.
Affected area map
The shaded area is the affected-area perimeter reported for this event by NOAA / National Weather Service (New Castle, DE; Burlington, NJ; Camden, NJ; Gloucester, NJ; Salem, NJ; Chester, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA), colored by hazard type. Pan and zoom to explore the map; when more than one observation exists, use the slider below to step through how the reported area changed.
Interactive affected-area map
New Castle, DE; Burlington, NJ; Camden, NJ; Gloucester, NJ; Salem, NJ; Chester, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA · ≈ 860 sq mi reported extent · Enable JavaScript to explore the map.
Shown as reported by our sources — not an official product. For current advisories and the authoritative map, see NOAA / National Weather Service ↗.
Restoration help near this event
Tap your city for a vetted local pro on that service, answered 24/7. Where we don't have a nearby city page yet, the step-by-step guides cover what to do first.
Water damage restoration
What to do now
Mold remediation
What to do now
Latest updates
Official updates and news coverage for this event, newest first — National Weather Service products, local storm reports, incident updates and press headlines. Official items are verbatim government text; news headlines link out to the original outlet.
- Storm report NWS PHI storm report
FLASH FLOOD — 1 WSW Penn Rose, DE
Water rescues on N Market St. Water up to the door of businesses with subjects stranded.
- News Aspen Daily News
Monday flash floods near New Castle extend I-70 closure into Tuesday
- Bulletin NWS Mount Holly NJ
Flash Flood Warning issued
New Castle, DE; Burlington, NJ; Camden, NJ; Gloucester, NJ; Salem, NJ; Chester, PA; Delaware, PA; Montgomery, PA; Philadelphia, PA
- News Colorado Public Radio
Mudslide closes I-70 between New Castle, Silt as flooding risk remains high Tuesday
Show 2 earlier updates
- Aspen Public Radio News
- Post Independent News
Updates are captured automatically from official and news sources, and may lag the live source. For the very latest, see NOAA / National Weather Service ↗.