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

A brutal heat wave across the eastern United States trapped millions of people in sweltering air this week with record-high ...

High temperatures across the Plains, Midwest, mid-Atlantic and Northeast are expected to hit at least 15 degrees above normal ...

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.

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