A heat advisory is in place across the Northeast, from Maryland to Maine, where residents are bracing for temperatures 5 to 15 degrees above average.

A flood watch has also been issued in Washington, D.C., while the Midwest also has the potential for flooding.

Lehigh and Northampton counties, as well as neighboring Bucks and Berks counties, will be under a heat advisory from 10 a.m. until 8 p.m. In the Lehigh Valley, a high of 92 is expected, but forecasters said it will feel closer to 102.

A heat advisory will be in effect for much of the area starting in the morning and lasting into the evening, according to the National Weather Service in Mount Holly, New Jersey. Temperatures will be in the low to mid 90s with heat indices near 100 to 105 even at the New Jersey shore and Delaware beaches.

On Wednesday at 6:47 a.m. a heat advisory was released by the National Weather Service in effect until 10 p.m. for Lower Columbia River, Tualatin Valley, West Hills and Chehalem Mountains, Inner Portland Metro,

The advisory is in effect until 8 p.m. Seek cool shelter: Opt for an air-conditioned room to stay comfortable. Avoid direct sun exposure: Protect yourself and check on vulnerable relatives and neighbors.

A heat advisory is in effect for the New York City area Wednesday and Thursday, with feels-like temperatures expected to exceed 100 degrees as more storms threaten the forecast. Air quality is also a concern for vulnerable groups.