This event is no longer active — it's kept here as a record. Recovery may still be underway; the guidance below applies.
1 concurrent flood warnings — 7 counties affected
A severe flood outbreak affected seven counties in Maryland, Pennsylvania, and Ohio from August 10–11, 2026, bringing water damage and mold risk to homes in Harford, Washington, Allegheny, Franklin, Jefferson, and Westmoreland counties.
Overview written from official NOAA / National Weather Service data.
- Type
- Flood Outbreak
- Extent
- ≈ 1,358,672 acres
- Began
- To end
Affected by this event? Open your area's damage guides below to reach a vetted local restoration pro, 24/7.
Affected area map
Each shaded area is one covered warning's reported footprint — this outbreak groups the 7 warnings listed below, colored by hazard type. Press Play below to watch each footprint appear in the order it was issued. Pan and zoom to explore the map.
Interactive affected-area map
Harford County, MD; Washington County, MD; Allegheny County, PA; Franklin County, OH; Jefferson County, OH; Franklin County, PA; Westmoreland County, PA · ≈ 2,100 sq mi reported extent · Enable JavaScript to explore the map.
2026-08-10 21:40 UTC · snapshot 7 of 7
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.
- News Daily Jefferson County Union
Deaths, damage reported as severe weather spawns tornadoes, flash flooding in the Midwest
- News Hartford City News Times
Meetings around Blackford County - Aug. 12, 2026
- News Hartford City News Times
Blackford County marriage licenses issued
- News Hartford City News Times
Blackford County court news - Aug. 12, 2026
Show 27 earlier updates
- NWS Baltimore MD/Washington DC Bulletin
- NWS PBZ storm report Storm report
- The Columbus Dispatch News
Major power outages in Licking and Franklin counties after storms
- NWS Baltimore MD/Washington DC Bulletin
- NWS State College PA Bulletin
- NWS Pittsburgh PA Bulletin
- NWS Wilmington OH Bulletin
- NWS Pittsburgh PA Bulletin
- NWS Pittsburgh PA Bulletin
- GMA Network News
- FOX 5 DC News
DC weather: Thunderstorm risk Monday as heat pushes into mid-90s
- wctv.tv News
- WSMV News
- The Jersey Vindicator News
The Delaware & Raritan Canal: New Jersey’s forgotten environmental treasure
- WSMV News
Williamson County flooding forces evacuations as more storms threaten Middle Tennessee
- WMAR 2 News Baltimore News
Your Voice, Your Stories: Annapolis Flooding, JFX Speed Cams, Lake Clifton
- WKRN News 2 News
Major flooding, evacuations after heavy rainfall in Williamson County
- Pittsburgh Post-Gazette News
Friday thunderstorms cause flooding in parts of Western Pennsylvania
- WSMV News
- Syracuse.com News
Flash flood warning active for Delaware County until Saturday evening due to thunderstorms
- WBAL-TV News
- CBS News News
Clean-up efforts begin in Pittsburgh area after Friday's flash flooding, "Seemed like a tidal wave"
- National Weather Service (.gov) News
- Weatherboy News
Storms with Damaging Winds, Hail, & Flooding Possible in New Jersey, Maryland, Pennsylvania
- TribLIVE.com News
- WPXI News
Heavy rains create flooding in parts of Allegheny, Westmoreland counties
- CBS News 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 ↗.
Warnings covered
Warnings this outbreak covered
This page tracks the outbreak as a whole; each entry below is one official warning thread with its own live status, map and update log.
- Flash Flood Warning — Allegheny, PA +2Allegheny, PA; Washington, PA; Westmoreland, PAsevereEnded
- Flash Flood Warning — Allegheny, PA +1Allegheny, PA; Westmoreland, PAsevereEnded
- Flash Flood Warning — Baltimore, MD +2Baltimore, MD; Harford, MD; Baltimore City, MDsevereEnded
- Flash Flood Warning — Delaware, OH +1Delaware, OH; Franklin, OHsevereEnded
- Flash Flood Warning — Franklin, PAFranklin, PAsevereEnded
- Flash Flood Warning — Frederick, MD +1Frederick, MD; Washington, MDsevereEnded
- Flash Flood Warning — Harrison, OH +1Harrison, OH; Jefferson, OHsevereEnded