Extreme heat warnings and heat advisories were issued across parts of the U.S. Southwest and Pacific Northwest on Friday.

Millions of California residents are being warned to avoid sun exposure as an extreme heat wave is expected for much of the ...

The sun's corona—the outermost layer of its atmosphere, visible only during a total solar eclipse—has long intrigued ...

Scientists say 4 billion people experienced at least one extra month of extreme heat because of human-caused climate change ...

The next time you see the UV index in the weather forecast, look more closely. You can protect yourself from too much sun.

WASHINGTON (AP) — Get ready for several years of even more record-breaking heat that pushes Earth to more deadly, fiery and ...

The Indy 500's 34th contender each May? Mother Nature. She is sometimes an opponent and sometimes an ally, depending on what ...

Nasa is warning of extreme space weather that could cause blackouts across the planet, as the Sun's hottest region is to turn ...

Solar storms and intense space weather are expected in the coming days and weeks as a highly active region of the Sun becomes ...

An Extreme Heat Warning is in effect from 9 a.m. Friday until 11 p.m. Saturday as highs hit 104° and Southern Nevada sees its first "major" heat risk of the year.

The activity is expected to cause auroras and potential blackouts on Earth, with Nasa ’s Solar Dynamics Observatory recently ...

X2.7-class eruption from sunspot AR4087 disrupts radio signals as the active region rotates toward Earth, raising the risk of ...