Maps show this July 4th could be hottest ever in parts of U.S.

Extremely dangerous heat, coupled with humidity, could result in heat index readings of 100 to 115 degrees from the Midwest ...

Blistering Heat Puts Damper on Some Fourth of July Events

While relief could come to the Great Lakes and the far Northeast over the weekend, the Mid-Atlantic and Southeast will stay hot.

Where, when and how bad the Fourth of July heat wave will be, in seven diagrams, charts and maps

The U.S. is looking at an unwelcome birthday gift: a dangerous heat wave arriving ahead of the holiday weekend. Limited time: ...

See How Europe’s Heat Waves Melted the Alps’ Glaciers

The snowfall from last winter disappeared a month sooner than usual, after two early hot spells. Huge volumes of exposed ice ...

Are you one of the millions of Americans trapped in a 'heat dome?'

Track extreme heat alerts with this interactive map.

Why we have so many ways to measure hot weather

Temperatures are skyrocketing for the third straight day across the Eastern US, but there’s at least three different ways to say how hot it really is.