"Dangerous heat will intensify across much of the Northeast and Mid-Atlantic early this week," meteorologist Jacob Hinson said.

A life-threatening heat wave has enveloped the East Coast, hitting cities with the worst of the high temperatures on Tuesday before relief moves in later in the week. This is the first major heat wave of the season,

The temperature was forecast to reach 99 degrees or higher on Tuesday, which could cause some voters, especially older ones, to stay home.