Although the showers and thunderstorms won't be widespread, some areas could see up to 3 inches of rain in a single hour, according to the National Weather Service.

The National Weather Service issued a flash flood warning at 5:03 p.m. on Wednesday in effect until 8 p.m. for Lancaster County.

A flash flood warning was issued by the National Weather Service on Wednesday at 5:03 p.m. in effect until 8:15 p.m. for Hampden County.

The National Weather Service said the thunderstorms include the potential for brief, intense downpours across New Jersey.

CBS News New York's Lonnie Quinn says humidity will be on the rise and temperatures will approach 90 degrees each day.

Showers and thunderstorms are expected in Houston today, with a high temperature of around 92 degrees and a heat index potentially reaching 105 degrees. The probability of precipitation is estimated at 60%,