Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

The National Weather Service called the forecast for above-average temperatures "the first significant heat wave this season.

A heat wave is currently affecting about 160 million people, according to the National Weather Service. Here's which states ...

A heat wave that starts Saturday is expected to send daytime highs soaring into the 90s through next Tuesday. For some of us, ...

A heat wave covered much of Europe on Monday, with record-hot first day of play at Wimbledon and forest fires in Turkey and France.

High temperatures across the Plains, Midwest, mid-Atlantic and Northeast are expected to hit at least 15 degrees above normal and will mark the hottest temperatures of the year to date, rising well ...