Flood Warning — Greene, OH; Warren, OH was recorded by Global Incident Tracker on Thursday, 20 August 2026 at 14:33 UTC. The event is classified as a flood incident with a severity rating of Severe, and was detected through the US National Weather Service (NWS).
Flood Warning issued August 20 at 10:33AM EDT until August 21 at 10:00AM EDT by NWS Wilmington OH ...The Flood Warning is extended for the following rivers... Little Miami River at Spring Valley. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Little Miami River at Spring Valley. * WHEN...Until Friday morning. * IMPACTS...At 12.0 feet, Water rises into low-lying areas close to the river near Spring Valley, Roxanna and east of Waynesville. Water floods Corwin Road, as well as Waynesville and Middletown Roads, along with flooding of Bellbrook golf driving range and portions of Washington Mill Park. * ADDITIONAL DETAILS... - At 10:00 AM EDT Thursday the stage was 11.7 feet. - Forecast...The river is expected to crest near 12 feet this afternoon and then fall below flood stage Friday morning. - Flood stage is 11.0 feet.
Where this happened
The incident is located in United States (North America), whose capital is Washington, D.C.. Historically, United States is most affected by hurricanes, wildfires, tornadoes, earthquakes and floods. You can follow every incident recorded in this country, updated live, on the United States incident tracker.
Approximate coordinates of the reported event are 39.559°, -84.050°. The marker on the map above shows this position; for news-derived reports the location reflects the place named in media coverage and may represent a district or city rather than an exact site.
Understanding flood events
River, flash, urban and coastal flooding events. Flood damage depends less on total rainfall than on how fast water arrives and where it has to go. Flash floods in urban areas can rise within minutes because sealed surfaces stop absorption, while river floods build over days and allow more warning time.
How severity is rated
Global Incident Tracker rates every event on a four-step scale — Minor, Moderate, Severe and Extreme — derived from the source signal: earthquake magnitude, official GDACS alert colour, or the volume of independent media reporting for news-derived incidents. This event is currently rated Severe. Ratings can change as more information becomes available, and a rating is a monitoring signal rather than an official government assessment.
Safety guidance for flood situations
- Never walk or drive through floodwater — 15 cm of moving water can knock you down and 60 cm can float a car.
- Move to higher floors or higher ground early; do not wait for water to reach you.
- Switch off electricity at the mains if water is entering the building and it is safe to reach.
- Treat all floodwater as contaminated: wash hands, boil drinking water and clean wounds.
- Follow only official instructions from local authorities and emergency services — this page is a monitoring record, not an emergency alert.
Data and verification
This record was generated automatically from the US National Weather Service (NWS) and de-duplicated against our archive. Early reports for any incident can be revised: locations get refined, magnitudes are recalculated and impact figures change as assessments arrive. We deliberately do not publish casualty numbers unless an official source states them. The original source report is linked at the top of this page.
Keep watching the situation on our live world incident map, browse every floods we track on the Flood tracker, or see today's global picture on the incidents today page.
Timeline and sources
Official warning
Issued by U.S. National Weather Service. A warning or forecast describes a hazard; on its own it is not a report that harm occurred.
How statuses are decided · the number of reports is never treated as confirmation.
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· received · event time 20 Aug 2026, 14:33 UTCFirst report Official warning
First recorded from U.S. National Weather Service.
Times are when this site received each report, in UTC; the event time is shown where the source gave one. Copies of one syndicated story count as one report.
Conditions at the time
19.4 mm of rain fell that day, and the temperature peaked at 27°C. Conditions are shown for context only — they do not establish a cause.
Weather reanalysis for this location and date via Open-Meteo.