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

At least 130 million people from Texas to Maine are under alert for dangerous heat and humidity over the next few days.

How is the heat index calculated, and why is it more important than the air temperature during some heat waves?

The heat dome won't dissipate soon. Dangerous heat is expected across parts of the Central and Southeast. through July, the weather service says. High temperatures will reach 100 degrees from Texas to ...

With a stretch of VERY hot weather ahead for the rest of this month into August, it is a good idea to look at how we measure ...

How low should you set your thermostat for as record-breaking heat sweeps over the country? Here's what experts and other ...