An extremely dangerous heat wave is underway for the eastern half of the United States as a potent heat dome reaches its peak, bringing the hottest temperatures of the year so far - the hottest in ...

A heat dome occurs when a large area of high pressure in the upper atmosphere acts as a reservoir, trapping heat and humidity ...

The rare June heat wave broke about 20 records on Sunday and is expected to break more on Monday. According to The Weather ...

Tens of millions of people across the eastern and central U.S. are bracing for more days of extreme temperatures as an ...

People are beating the heat wave in Chicago the best way they know how -- jumping into the city pools -- on Monday afternoon.

A boater has been missing in Lake Michigan since Saturday afternoon. The Chicago Fire Department says this is now a recovery mission.

The city remains engulfed in a heat dome — and scientists and researchers in Chicago who pay close attention to heat have ...

Patients, staff and medical personnel in a Washington Park hospital are coping with steamy conditions Monday afternoon as ...

NBC News chief consumer investigative correspondent Vicky Nguyen shared what the Department of Energy recommends you should set your air-conditioning at to run efficiently.

Park Forest village leaders spoke out for the first time, and threatened to levy fines against the complex owners.

Utility providers across the Midwest and East reported tens of thousands of power outages due to this week’s heat wave.