Flash Flood Warning Issued for Butler, Montgomery, Preble, and Warren Counties in Ohio

Alert Details

The National Weather Service in Wilmington has issued a Flash Flood Warning for several counties in Ohio. The warning was issued at 12:01 AM EST on March 5, 2026, following reports from local law enforcement of active flash flooding within the warned area.

Affected Areas

The warning covers the following geographic regions in Ohio:

• Butler County (Southwestern Ohio)
• Northwestern Warren County (Southwestern Ohio)
• Southern Montgomery County (West Central Ohio)
• Southern Preble County (West Central Ohio)

Specific locations that may experience flash flooding include Hamilton, Kettering, Middletown, Fairfield, Mason, Oxford, Miamisburg, Lebanon, Springboro, Monroe, Trenton, Franklin, Bellbrook, Moraine, Carlisle, South Middletown, West Carrollton, Ross, Camden, and Gratis.

What You Should Do

Residents are urged to follow the safety mantra: “Turn around, don’t drown” when encountering flooded roads. Most flood-related deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. To report flash flooding, visit the NWS website at weather.gov/iln or submit a report via social media when it is safe to do so.

Expected Conditions

Flash flooding is being caused by heavy thunderstorms. According to law enforcement reports, between 1.5 and 3 inches of rain have already fallen. Additional rainfall amounts of 0.5 to 1.5 inches are possible. Expected impacts include the flooding of small creeks and streams, urban areas, highways, streets, and underpasses, as well as other poor drainage and low-lying areas.

Timeline

The alert is effective immediately as of 12:01 AM EST and is currently set to expire at 3:00 AM EST on March 5, 2026.