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

While Texas bakes under sweltering conditions, it's far from alone. Millions are under threat of extreme heat this week.

More than 37 million Americans are under heat advisories across the U.S., according to the National Weather Service. Here's the hardest hit areas.

A heat dome​ is trapping over 90 million Americans in extreme temperatures this week with the National Weather Service​ ...

More than 200 million people across most of the United States are on alert for widespread, dangerous heat on Monday.

The Centers for Disease Control and Prevention (CDC) says that extreme heat can lead to heat-related illnesses, especially ...

A Sweltering Heat Dome Is Pummeling the Middle of the US. Here's What That Means A wicked combo of hot weather and high barometric pressure can lead to very high temperatures.

Summer will make a dramatic entrance in the U.S. this week with a heat dome that will bring stifling heat and uncomfortable humidity to millions. The soupy conditions will stretch into next week ...

The risks of heat are only growing thanks to lasting heat waves, extreme nighttime temperatures and unusual humidity, like ...

Safety recommendations for extreme heat include: hydrating frequently, in particular avoiding sugar, alcohol or caffeinated drinks, avoiding peak sun exposure, limiting activities from 12-6 p.m ...

It’s the hottest time of the year in the United States and another heat dome is about to make millions of people feel every ...

The Dragon Bravo Fire, ignited by lightning around July 4, has become the largest wildfire in the continental United States ...