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The evaporative cooler was an essential invention perfected in the U.S. before central air conditioning became mainstream.

Hundreds of commercial flights will be told to change their paths over the northeastern Atlantic Ocean during the next two winters to show how minor altitude adjustments can reduce aviation’s climate impact.

What we wear can affect how the body handles extreme heat, but there’s no single “best” fabric.

Residents of the Swiss village of Kandersteg face a looming threat from an unstable mountain rock formation called Spitze Stei.

A deadly stretch of unsettled weather is continuing with thunderstorms, heavy rain and flash flooding an ongoing threat from the Midwest to the mid-Atlantic.

Brazil’s President Lula da Silva says oil drilling in northern coastal regions could be a "passport to the country’s future."

Belgium is battling one of its largest wildfires, despite cooler weather and rain.

Torrential rains have pounded southern South Korea, leaving one person dead and four others injured.

Firefighters are battling wildfires in Belgium and Greece, with a massive blaze scorching a nature reserve in eastern Belgium.

Hurricane Lala has weakened to a tropical storm after raking Hawaii without making landfall.

Indiana public safety officials say at least seven people have died during days of heavy rain and historic flooding in the state.

The water level at Lake Powell has fallen to a record low in another sign of crisis along the Colorado River.

Indiana authorities say at least five people have died in storms across the state this week, as first responders worked to rescue more people Saturday from rising waters in neighborhoods along the White River in Indianapolis.