Dangerously hot conditions hit states up and down the West Coast over the weekend, owing to a persistent heat wave stretching ...

Parts of California, Oregon and Washington state will experience extreme heat at least through Tuesday, forecasters say.

A looming heat wave has triggered extreme heat warnings and advisories for 80 million people from the U.S.-Mexico border to ...

The agency warned that extreme heat poses a danger in the evening as well, as temperatures are expected to remain above ...

Amid ongoing wildfires, extreme heat is gripping the Pacific Northwest, with temperatures climbing into the mid-90s across ...

A heat wave gripping the Pacific Northwest has prompted an extreme heat warning in Oregon. How high will temperatures get?

Summer is the time for sunshine, but Americans have been getting a surplus of heat this summer, with millions of people ...

Nationally, extreme heat causes more deaths each year than any other weather event, including floods, hurricanes and tornadoes.

Residents in the Western U.S. are enduring a heat wave with temperatures reaching dangerous levels across Washington, Oregon, ...

New research shows atmospheric moisture helps explain why some extreme weather events, like heat waves and floods, last longer than expected.

Starting Wednesday, temperatures are expected to be in the high 90s and low 100s in inland areas. Officials say now is the ...