Cars were washed away and drivers rescued in Perth Amboy, New Jersey.
It could be an even worse situation on Friday with more rain on the way.
Tow truck drivers were still trying to rescue a stranded SUV as the water was slowly receding around it.
According to officials it had been submerged and it wasn't the only vehicle buried in the high water.
"We winced one car out from the other side, it was a Mini Cooper, and winced that to the other side of Route 9, the water was over the roof," a tow truck driver said.
Law enforcement used boats to search for vehicles they might have missed in the high water, and this was after several rescues.
What happened in the area was a classic flash flood.
At around 5:30 p.m. on Thursday, heavy driving rains caused storm drains to fill and in a matter of minutes the ramp connection 440 North to Route 9 South was flooded.
"Reports were that there were cars trapped in the water with people trapped in the car. We arrived on scene, we had three cars submerged, we had one lady up to her knees, she was on the roof of the car, the water was up to her knees," a firefighter said.
They rescued her and there was a Good Samaritan who rescued two other motorists from their cars.
What is left now is the damage to the cars from the flooding, and the detours that were caused into the evening.
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