Flash flood warning issued for Berks, Philadelphia, and Lancaster Counties in Pennsylvania due to heavy rain and thunderstorms.

On Monday, a flash flood warning was issued for Berks County, Pennsylvania, until 7:30 a.m., with heavy rain and thunderstorms causing flash flooding in small creeks, streams, urban areas, highways, and low-lying areas. The National Weather Service warned residents to avoid driving through flooded roads, as most flood deaths occur in vehicles. Additional flash flood warnings were also issued for Philadelphia County and Lancaster County in Pennsylvania.