Heat-related alerts had been issued for 18 states as of Monday, with the National Weather Service (NWS) urging residents to take steps to reduce the risk of heat illnesses.

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

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

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 ...

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

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

Millions of Americans could face intense heat, severe storms, and flooding this week, according to forecasters.

The National Weather Service is forecasting another heat wave for the Stark County area this week. Here's how high you can ...

A heat advisory will be in effect from 11 a.m. Monday until 9 p.m. Tuesday for the following counties in central Alabama: ...

With extreme temperatures forecast to soar into the upper 90s over the next three days, residents of southeast Nebraska are urged to take precautions as the heat index rockets to ...

The National Weather Service has issued an extreme heat warning for most of this week. Temperatures are expected in the mid ...