It's a scorcher in New York City. On Tuesday, June 24, as residents of the five boroughs headed to the polls to cast their ballots in what promises to be a unique primary election, heat radiated off the concrete.

The temperature in New York City have reached 100 degrees as the eastern U.S. sweltered under an extreme heat wave.

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