Would-be stargazers in several northern states should keep there eyes on the sky Wednesday night, as geomagnetic storms are poised to make the northern lights visible further south than usual. ...

Sweltering heat happens every summer, but to get close to the bar of a state's all-time hottest temperature usually takes a heat wave that's on another level.

Tens of millions of Americans were under heat warnings and advisories as a heat wave continued to grip much of the country.

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

At least eight states were expected to see temperatures that would feel hotter than those in Death Valley—often referred to as the hottest place on Earth—on Wednesday, according to the National ...

For 150 million people across the United States, humidity surged to levels higher than Miami late Monday. Maps show where.

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

Hot weather and dry conditions have led to “elevated” wildfire threats across the state, the U.S. Drought Monitor said.

Extreme humidity and heat will affect about 265 million people across the country this week. Maps show where and when to ...

New York City also felt the heat, tying its longstanding daily record of 96 degrees for the date, set in 1888 in Central Park ...

The latest solar flare follows an M-class one, the second-highest on the scale, that occurred days earlier on June 15. It ...

Erick came ashore down southern Mexico's Pacific coast on Friday morning as a Category 3 major hurricane, with fears of ...