Ever notice how stepping into a city feels like walking into an oven, especially during summer? The air seems thicker, the ...

A peer-reviewed study published in Science has documented frequent new particle formation during a heat wave, a phenomenon ...

Climate change is projected to make such events more common, but in the so-called "air-conditioned city," those without access to cooled air are most vulnerable to heat-related illnesses.

Tiny aerosol particles in the air play a big role in regulating how much sunlight our planet absorbs or reflects, and how clouds form above us. In a recent study, researchers found that extreme heat ...

NEW YORK – The first major heat wave of the summer is firing up across the eastern half of the U.S. this week, with major cities along the Interstate 95 corridor like Washington, Philadelphia and New ...

Philadelphia broke a daily record high today, reaching 99 degrees as the region's heat wave officially began. The high temperature so far at Philadelphia International Airport reached 99, breaking a ...

Southern California continued baking under a heat wave Monday that's expected to last a few more days, but forecasters are also warning that thunderstorms, some flash flooding and high winds could be ...

A heat wave impacting much of the central and eastern U.S. will bring high temperatures to Tennessee through the week. Heat advisories are in effect for Memphis and Nashville, with heat index values ...