The heat index could reach more than 100 degrees on Monday and Tuesday, according to the National Weather Service.

On Monday at 5 a.m. a heat advisory was issued by the National Weather Service valid from 11 a.m. until Wednesday 8 p.m. for ...

A heat advisory was issued by the National Weather Service on Monday at 5 a.m. valid from 11 a.m. until Wednesday 8 p.m. for ...

The National Weather Service issued a heat advisory at 2:10 a.m. EDT on Monday valid between noon EDT and 9 p.m. EDT for ...

The National Weather Service released an updated extreme heat warning at 12:53 p.m. on Friday in effect until 9 p.m. for ...

The National Weather Service issued an updated heat advisory at 12:45 a.m. on Monday valid between 11 a.m. and 6 p.m. for ...

A heat advisory goes into effect Thursday for parts of Connecticut where heat index values will soar past 100 degrees on ...

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