A heat advisory is in effect for most of the region today, "with heat index values climbing to between 95 and 100," according to the National Weather Service branch in Norton, MA. The advisory ...

See detailed maps of the latest temperature forecasts across Europe.

Real world measurements of how much extra heat the Earth is trapping are well beyond most climate models. That’s a real problem.

Many states will experience temperatures that feel in the triple digits on Thursday, forecasters say.

U.S. regional electric grid operators scrambled to avoid rotating blackouts on Tuesday, preserving razor-thin power generation margins as temperatures in the eastern half of the country soared ...

Extreme heat is impacting states across the country. See maps of high temperature forecasts and heat index levels.

More than half the country, including Illinois, is currently in a heat dome. Here's what that means and how to stay safe during excessive heat.

A heat wave is blanketing Delaware today and will last several days. When is relief on the way? Here's the latest forecast.

Several states are expecting extreme heat, with the heat index, or feels-like temperature, surging past 100 degrees.