This event is no longer active — it's kept here as a record. Recovery may still be underway; the guidance below applies.
Part of: Wabash County Area Flooding — August 2026 →
Flash Flood Warning issued August 20 at 1:24AM EDT until August 20 at 4:15AM EDT by NWS Wilmington OH
This is a severe-significance flash flood warning event affecting Greene, OH; Montgomery, OH, tracked from official feeds (NOAA / National Weather Service). We update this page as the situation develops.
- Type
- Flash Flood Warning
- Extent
- ≈ 221,942 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
The shaded area is the affected-area perimeter reported for this event by NOAA / National Weather Service (Greene, OH; Montgomery, OH), 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
Greene, OH; Montgomery, OH · ≈ 350 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.
- Bulletin NWS Wilmington OH
Flash Flood Warning issued
Greene, OH; Montgomery, OH
- Storm report NWS ILN storm report
FLASH FLOOD — 2 WSW Zanesfield, OH
Water rushing across Mt Crest Drive just east of County Road 55.
- Storm report NWS ILN storm report
FLASH FLOOD — 3 ESE Anna, OH
Rushing water across Meranda Road just east of Sidney Freyburg Road.
- Storm report NWS ILN storm report
FLASH FLOOD — 3 SW Bellefontaine, OH
Water rushing across Township Road 198 south of Township Road 200.
Show 5 earlier updates
- NWS ILN storm report Storm report
- NWS ILN storm report Storm report
- Dayton Daily News News
Public Health to spray Thursday, Friday after mosquitoes test for West Nile in Greene County
- Times Union News
- GreenevilleSun.com News
Heat advisory in effect today, while severe thunderstorms and flash flooding possible
Updates are captured automatically from official and news sources, and may lag the live source. For the very latest, see NOAA / National Weather Service ↗.