Two people have died after their car was swept away in flood waters in New Jersey Monday night, authorities said in a statement posted to Facebook Tuesday. "The City of Plainfield is deeply saddened to confirm that two individuals lost their lives during the flash flooding that occurred on July 14," the statement read.

Dozens of flash flood warnings are in effect for millions across several states and Washington, D.C., as slow-moving summer storms impact the East Coast Monday evening.