The National Weather Service urged people to avoid travel if a flash flood warning was in place for their area.

Flash floods are occurring across the U.S., from Texas to New Jersey. Here's what you should know as risks escalate.

In Kansas City, Kansas, the right lane on westbound K-32, also known as the Kaw Valley Scenic Highway, is closed between South 78th Street and Swartz Road due to flooding. The Kansas Department of Transportation expects the lane to be closed for the next week or two, Kansas City area public information officer Delaney Tholen said.

Early on Thursday morning the National Weather Service's Lake Charles office announced that it would be expanding the flash flood warning that previously went as far west as Vermillion Parish to include Calcasieu, Cameron, Allen, Jefferson Davis and Beauregard parishes. The watch is in effect from 7 a.m. on Thursday to 7 p.m. on Saturday.

Storms prompted flash flood warnings across the New York City metropolitan area Monday night, with photos showing severe flooding across the city and in parts of New York state and New Jersey.

The Missouri River is not expected to reach any flood stage in Kansas City, but is predicted to cause moderate flooding downstream in Napoleon and Miami, Missouri. The major river has already risen 5 feet, and is forecasted to rise another 3 feet before its crest at around 7 p.m.

A slow-developing, broad area of low pressure located over the far northern portion of the Gulf is threatening to bring heavy rain and flooding.

Hundreds of New Jersey homes were damaged by flooding Monday​, and many families are just beginning the process of filing insurance claims.