Maps show where extreme humidity and 90- or 100-degree temperatures will affect around 255 million people across the United ...

The NWS says the Plains and the Midwest region will see the "hottest temperatures of the season" this weekend.

Overhead power lines—called catenary wires—are especially susceptible to temperature swings. Amtrak trains operating on the ...

Temperatures are expected to reach the mid 90s for several days beginning Saturday, according to the National Weather Service ...

The first major U.S. heat wave of the year starts on Friday. It brings dangerously high temperatures and is expected to last ...

Franklin High School will hold a graduation Saturday at American Family Field during extreme heat. Accomodations are being ...

Humans are on track to release so much greenhouse gas in less than three years that a key threshold for limiting global warming will be nearly unavoidable, according to a study to be released Thursday ...

Las Vegas to remain under an Extreme Heat Warning with triple-digit temperatures and nighttime heat, with cooler weather ...

Three Lincoln libraries and a community center is offering extended hours for anyone looking to get out of the heat over the ...

The Chicago area is preparing for its first significant heat wave of the season, with officials in Cook County issuing an ...