Flash flooding poses significant risks to small creeks, streams, urban areas, highways, streets, and underpasses. The NWS warns that flash floods can uproot trees, damage infrastructure, and create hazardous conditions for vehicles and pedestrians. Residents in flood-prone areas should be especially cautious, as most flood-related fatalities occur in vehicles. The affected areas include several communities in northeastern Monmouth County, such as Middletown and Red Bank.