A heat advisory for Florida's Treasure Coast is in effect from noon through 6 p.m., with heat index values from 109 to 112 ...

All of Florida will be under heat advisories Monday, July 21, as a heat dome spreads from the Ohio and Mississippi valleys.

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

San Antonio is set to experience intense heat, with temperatures nearing 100 degrees and high heat index values.

Canadian wildfire smoke has returned to parts of Wisconsin and may last through Monday morning. Then comes more extreme heat and humidity.

As we approach a very warm week with the heat index increasing to dangerously high levels, City officials remind citizens to ...