The first major U.S. heat wave of the year starts on Friday. It brings dangerously high temperatures and is expected to last ...

Temperatures are expected to soar along the Interstate 95 corridor on the East Coast next week, with cities like Philadelphia ...

A “significant and extremely dangerous heat wave” is expected to send temperatures soaring across much of the United States ...

Maps show where extreme humidity and 90- or 100-degree temperatures will affect around 255 million people across the United ...

Heat is the number one killer -- and it’s heading to the most densely populated part of America for a prolonged period.

Some parts of the U.S., such as Phoenix, Arizona, are famously hot without the mugginess. Phoenix and nearby desert regions ...

Just in time for the start of summer on June 20, a heat wave is expected to scorch a large section of the United States, ...

A punishing heat wave in the Southwest is set to spread east in the coming days, with temperatures over 90 degrees Fahrenheit expected in the Northeast and possible record highs in parts of New ...

Extreme heat warnings are in effect across Arizona and Nevada, raising concerns for children's health. Heat advisories span ...

It was only a matter of time before a long-lived heat wave would develop in the Midwest and Northeast. This one could last ...

Extreme temperatures and humidity from a heat dome will pose health risks to millions across the U.S., experts say.

A dangerous heat dome is coming to the Midwest and East Coast. It's particularly risky ... Such an intense and early heat wave, doctors warn, can be especially dangerous. Alejandra Borunda from ...