More than 125 million Americans are under the highest level of extreme heat alerts during a wave of above-average ...

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

"Dangerous heat will intensify across much of the Northeast and Mid-Atlantic early this week," meteorologist Jacob Hinson ...

Multiple regions of the country faced the possibility of severe weather on Thursday, according to forecasters.

Polluted air will remain a threat Friday for millions of Americans across the eastern United States as the Canadian wildfires continue to send smoke billowing across the region, tinging the skies ...

A new study published in the journal Proceedings of the National Academy of Sciences presents the first comprehensive map of autumn stopover hotspots of landbirds for the eastern United States.