Heavy Rain Floods Costco Parking Lot in Union

Several streets in Union County turned into rivers Wednesday evening as passing thunderstorms battered the New York metro area, video posted on social media shows.

In one area of Union, the shoppers at Costco had to wait to leave return home with their packages after heavy rain flooded the parking lot.

Just before 4:30 p.m., forecasters issued flash flood warnings for much of Northern NJ as a significant amount of moisture in the atmosphere increased the chances of downpours, AccuWeather meteorologist said.

There were no serious injuries reported during the rainstorm.