Authorities have warned residents to avoid unnecessary travel as waters inundate transportation infrastructure.

It wasn't clear if anyone was believed to be missing in the aftermath. Monday's storms were the second to turn deadly in the Garden State this month. Early in July, three people died when thunderstorms felled trees. Two of them were from Plainfield.

New Jersey governor tours storm damaged area after a deluge of rain soaks his state; two people were killed after their vehicle was swept up in flood waters

The flooding storms on Monday night flooded roads, knocked out power and led to a state of emergency for New Jersey. See which towns got the most rain.

Thousands across New Jersey lost power Monday, July 14, as severe storms blew through the region, toppling trees and knocking down wires.More than 4,600 customers were in the dark as of 6:45 p.m., utility officials said.

Flash flood warnings were issued by the National Weather service Monday night as heavy storms rolled into the area. Flood warnings were issued for Morris, Warren, Bergen, Essex, Hunterdon, Hudson, Passaic, Middlesex, Somerset and Union Counties, according to the National Weather Service.

The weather service said there's a "marginal" risk of flooding in portions of Nassau and western Suffolk, but nothing what's expected to the west and north of LI.