Most of Massachusetts is under a heat advisory through Wednesday, and forecasters are urging residents to look out for the high temperatures.

Tuesday is shaping up to be our hottest day of the week. Thermometers will climb into the mid to upper 90s in the afternoon. When factoring in humidity, it’ll feel right at or above 100 degrees.

A heat advisory is in effect for most of southern New England through 8 p.m. Wednesday, with the peak of the heat expected Tuesday.

The Storms Prediction Center has placed portions of our entire area in a "slight" risk, or level 2. The SPC also has increased the risk of some damaging, straight-line winds Friday afternoon and evening, particularly from Worcester County and areas south-westward.

With this week's heat wave likely leaving conditions feeling like it is more than 100 degrees on Tuesday, Massachusetts could see another big change to the forecast before the week ends.

A heat advisory is in effect in Boston and several other Massachusetts communities through 7 p.m. on July 17. The National Weather Service warned of "dangerous heat and humidity" with heat indices soaring to 95 to 100 degrees. Boston Mayor Michelle Wu also declared a heat emergency for the City of Boston from July 16 to 18.

A heat advisory will go into effect Monday morning as temperatures are set to reach the 90s and above through Wednesday.

Heat advisories are in effect from Monday to Wednesday across the Northeast, the National Weather Service said.

Boston faces rain and a thunderstorm Sunday, a 70% chance of precipitation, and an upcoming heatwave with highs near 80 degrees.