A heat wave hit much of the central U.S. over the weekend, while snow and cool temperatures arrived in the Northwest.

Virginia, Montana and Vermont ranked as the top three states in the study, which measured 13 key metrics, including voter ...

Large parts of the United States faced a radio blackout on Thursday following a strong solar flare from the sun. The "extreme ...

The northern lights, also known as the aurora borealis, may be visible in as many as 15 northern states Wednesday night, June 25, according to NOAA's Space Weather Prediction Center (SWPC). Most of ...

For those in the northern states, the aurora borealis, or northern lights, are likely to appear this week, according to the ...

More than 125 million Americans are under the highest level of extreme heat alerts during a wave of above-average ...

More than 125 million Americans are under the highest level of extreme heat alerts during a wave of above-average ...

Humidity will soon surge to extreme levels across 40 states. Find out where there will be excessive heat and humidity — and ...

Chemtrail conspiracy theorists claim that the government or other groups are using aircrafts to release chemicals or metals ...

What time is liftoff? ULA's Atlas V should be visible outside of Florida pending weather. Did your city, state make the ...

An air quality map shows conditions improving in the U.S. on Friday as smoke from the Canadian wildfires subsides.