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

More than 160 million Americans are under the highest level of extreme heat alerts during a wave of above-average ...

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

A heat wave hit much of the central U.S. over the weekend, while snow and cool temperatures arrived in the Northwest.

More than 160 million Americans are under the highest level of extreme heat alerts during a wave of above-average ...

Several states are expecting extreme heat, with the heat index, or feels-like temperature, surging past 100 degrees.

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

For 150 million people across the United States, humidity surged to levels higher than Miami late Monday. Maps show where.

Northern Vermont, New Hampshire and Maine are in the forecasted view line to potentially see the northern lights for both ...

The NOAA has warned that record-breaking heat could be seen across the state in the next several days. Here are the records ...