A flash flood warning is in effect for southeastern Mercer County, southwestern Monmouth County, and south-central Middlesex County in northern New Jersey until 6:45 p.m. Monday, July 12.

Up to an inch of rain has fallen already in some areas, and more rainfall of two to three inches is possible in a short period of time.

Flash flooding is expected to begin in some areas or already has begun, according to the National Weather Service. Flooding of small creeks and streams, highways, streets, and underpasses as well as other low-lying areas is possible. The New Jersey Turnpike between exits 8 and 8A. Interstate 295 between mile markers 58 and 66, and Interstate 195 in New Jersey between mile markers 0 and 15 could possibly experience flooding.

“Turn around, don`t drown” when encountering flooded roads. Most flood deaths occur in vehicles. Drivers should not attempt to drive around barricades or drive cars through flooded areas.