BOSTON (WHDH) - A two-day heat advisory has been issued for parts of Massachusetts as temperatures are expected to stay in the 90s.

The heat advisory went into effect at 8 a.m. Monday and will last until 8 p.m. Tuesday for Essex, Franklin, Hampshire, Plymouth, Bristol, Middlesex Hampden, Norfolk, and Suffolk counties, according to the National Weather Service.

Monday will be the second day in the 90s for several towns and cities, while Tuesday is projected to be the hottest day of the week with temperatures between 91 and 96 degrees.

Heat index values will be between 95 and 100 degrees due to the rising humidity.

The combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible, the NWS warned.

The public is urged to drink plenty of fluids, stay in an air-conditioned room, stay out of the sunshine, and check up on relatives and neighbors.

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