Record-high minimum temperatures, in which temperatures don't drop in the nighttime hours, are likely across much of the U.S.

Heat advisories will go into effect for parts of the state today. Today; An upper-level ridge is beginning to build across ...

A heat dome happens when hot air is trapped over an area due to a persistent high pressure system, William Gallus, a ...

Not only are Iowans sweating in this humidity, but the corn stalks are too. These factors are making it humid in Iowa.

Very high to locally extreme humidity levels are forecast to make heat more dangerous across central states through the weekend, affecting places like Omaha and Minneapolis before reaching the ...