Hot and humid conditions are expected to envelop Massachusetts on Friday, with temperatures climbing above 90 and heat index values, or “feels like” temperatures, likely to clear 100. The warmest temperatures are expected in the valleys and the Boston metropolitan area,

The areas that will be impacted include Lowell, Lynn, Lawrence, Haverhill, Peabody, Methuen, Salem, Billerica, Beverly, Woburn, Chelmsford, Andover, Dracut, Tewksbury, Gloucester, North Andover, Saugus, Danvers, Wakefield, and Reading.

Temperatures in Massachusetts are expected to heat back up. Cape Cod won't be as bad as the rest of the state. Here's what to know.

On Thursday at 6:01 a.m. the National Weather Service released a flash flood warning in effect until 9 a.m. for Bristol, Middlesex, Norfolk, Plymouth, Suffolk and Worcester counties.

The National Weather Service has issued a heat advisory for parts of Massachusetts starting Thursday, July 24, and Friday, July 25, lasting until 8 p.m. Friday. Most of Southern New England, except the coastline and the Berkshires, will be impacted.

Unsettled weather today could product thunderstorms capable of causing flash floods in parts of Massachusetts.

Flash flooding could impact parts of south central and southeastern Massachusetts, Connecticut, and Rhode Island, Boston meteorologists warned.

The National Weather Service released a severe thunderstorm warning at 7:06 p.m. on Sunday in effect until 8 p.m. for Essex and Middlesex counties.

The past few days have featured near or slightly cooler than average temperatures. By Thursday, though, the sea breeze will hold off and temperatures are expected rise into the low 90s.