New York City, Westchester, Rockland, Bergen, Essex, Passaic and Hudson counties are under a Flash Food Warning until 1 p.m.
Excessive runoff from heavy rain could cause flooding of urban areas, highways, streets, underpasses and low-lying areas, according to MyFoxNY.
Residents in those areas are advised to move to higher ground and should not attempt to drive through water-covered roads.
A Tornado Warning for Fairfield County in Connecticut expired at 11:30 a.m.
Rain and thunderstorms will continue throughout the day and be scattered into later parts of the week.
Temperatures for the Fourth of July currently are listed at 89 degrees with a forty percent chance of rain and thunderstorms according to weather.com.