In Plainfield, New Jersey, two people were killed when their car was swept into Cedar Brook, city officials said. This comes days after two others were killed in severe storms in Plainfield on July 3.

New Jersey is under a state of emergency after a flash flood caused at least two deaths in Plainfield and damage across Union County.

Heavy rain has swept across parts of the Northeast, inundating sections of New York and New Jersey with flash flooding that stranded vehicles in roadways, closed subway lines and led to the declaration of a state of emergency.

Forecasters warned more rain and flash flood risk is expected on July 15 after storms flooded out roads the day before.

New York and New Jersey hit by torrential rain and flash floods, forcing highway closures, suspending subway lines and flight delays.

Heavy rain caused flash flooding and road closures around the Lehigh Valley on Monday evening as storms made their way through. More rain is expected this week.

Heavy rains during the evening brought flooding, road closures and power outages throughout New Jersey, which is under a state of emergency.

Officials in one county told residents to only dial 911 for life-threatening emergencies Monday night, according to a social media post from officials.

Camp Mystic's executive director began evacuating campers approximately 45 minutes after the National Weather Service issued a "life-threatening flash flooding" alert.

Flash flood watches and warnings were in place in parts of New Jersey, New York, Pennsylvania, and surrounding areas as downpours moved through the region.

A flood watch is in effect into July 15 for more than a dozen counties as saturated ground gets drenched again.