FONTANA, Calif.—Southern California may be in a drought, but San Bernardino County is thinking about the safety of motorists who use roads prone to flash flooding.

Signs warning drivers to "Turn Around, Don't Drown" during floods were recently posted in the Lytle Creek Road area north of Fontana and on Deep Creek Road in Hesperia, flood-prone areas on both sides of the San Bernardino Mountains.

A Fire Department statement Wednesday notes that both locations have seen numerous rescues as a result of motorists trying to cross flooded roadways.

The signs were recently provided by the National Oceanic and Atmospheric Administration.