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

The National Weather Service called the warm and above-average temperatures coming in behind the system "the first ...

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

Heat dome will cause dangerously high temperatures in many places across the country this weekend, especially the Midwest and ...

A heat dome has begun to blanket the US and is expected to bake more than 30 states with high temperatures that could shatter ...

More than 150 million Americans are under the highest level extreme heat alerts during a wave of above-average temperatures.

Heat advisories and extreme heat watches are in place across much of the U.S., lasting until Tuesday with the potential to be ...

The 'Fire & Smoke' map provides you with real-time fire hotspots and 2-day forecasted smoke concentrations due to active ...

Humidity will soon surge to extreme levels across 40 states. Find out where there will be excessive heat and humidity — and ...

A map on the heat dome shows the heat risk from minor to extreme across the eastern part of the US (Picture: Fox Weather) A heat dome has begun to blanket the US and is expected to bake more than ...

A powerful X-class solar flare erupted on June 19, disrupting radio signals and potentially setting the stage for geomagnetic ...