An unusually intense and early season heat wave has shattered March temperature records across much of the U.S. Southwest and beyond, as a massive heat dome grips the region and sends temperatures ...

Extreme heat has a way of exposing society’s vulnerabilities. And as extreme heat events become more frequent in the U.S., data shows that the poorest Americans will be most at risk. People living in ...

A federal heat risk map is warning that large parts of the United States could soon face dangerous, potentially life-threatening conditions, with forecasters projecting triple-digit heat index values ...