What is the heat index? Learn how humidity makes temperatures feel hotter, why it matters during New York's heat wave and ...

New York state has entered its first heat wave of the summer - with highs expected to soar into the upper 90s and even past ...

Heat can be dangerous, but health experts say there are ways to manage the threat. Scorching temperatures, especially ...

Sometimes you can stay hydrated and still run; other times you should just pack it in.

Michigan's heat wave this week will feel even warmer because of high humidity. Here's how the heat index works.

Houstonians have usually endured weeks of sticky 90-degree heat and made their first complaints about electric bills by the time the first day of summer arrives (whenever that may be). Elsewhere in ...

President Trump’s tariffs on Canada, China, and Mexico could upend U.S. trade. These nine charts show what’s at stake, what comes next, and why it matters. Nearly half of all U.S. imports—more than $1 ...

When the weather gets muggy, iridescent bees shift their metallic hue. The insects are a rich blue-green when ambient humidity is low. But as the amount of moisture in the air increases, the bees turn ...

In the evening of March 1, an oil tanker turned off its transponder about 25 kilometers (15 miles) east of the emirate of Sharjah and disappeared into the murk of jammed signals over the Strait of ...