View Comments Update, 10:10 p.m. : NWS issued a flood warning for portions of Hamilton and Butler counties. A number of roads already have standing water, which could pose a danger to those driving at night. Thunderstorms are producing a heavy rainfall and between 2.5 and 3.5 inches of rain have fallen already. The flash flood warning will be in effect until 11:30 p.m. Areas that may experience flash flooding include St. Leon, Lawrenceville, Penntown, Mount Healthy Heights, Forest Park, Greenhills, Springdale, Glendale, Northbrook, Fairfield, Sharonville, Reading, Harrison, North College Hill, Wyoming, Deer Park, Finneytown, Ross, Taylor Creek, Blue Jay and Colerain Township.