Heat index values could approach 100 degrees early this week in Southeast Texas, but weather models are showing a cold front soon.

Heat waves and cold waves are associated with increases in major cardiovascular events that are exacerbated by air pollution.

The unusually hot waters are lurking in the sea off the California coast, and they could wreak havoc on the state’s weather ...

The clock is ticking on the summerlike weather across much of the eastern United States, with a potentially painful reality ...

Add Yahoo as a preferred source to see more of our stories on Google. Mac Merrill snowboards without his coat during a heat wave on March 18 in Breckenridge, Colo. (Michael Ciaglo / Getty Images) ...

The Plains and Southeast are getting a taste of summer as the heat wave that has created stifling temperatures in the Southwest continues to push east. More than 1,800 heat records have been broken ...

A comprehensive new study extending the U.S. Historical Climatology Network (USHCN) record back to 1899 finds that both hot ...

After a weekend of unseasonable heat topping 30 degrees Celsius (86 degrees Fahrenheit), temperatures dropped sharply within ...

The Carolinas will experience another toasty Saturday with highs in the low 90s, followed by a cold front moving in on Sunday ...

East Coast braces for prolonged heat wave as temperatures near records - The heat is unusual for April, not only because it ...

The D.C. area marks its first signs of summer for the year, with an incoming heat wave bringing temperatures up into the 90s ...