At least nine states along the East Coast faced summer swelter on Monday, and the steamy weather is expected to persist on ...

A brutal heat wave across the eastern United States trapped millions of people in sweltering air this week with record-high ...

A map shows the impact on U.S. states along the Gulf Coast and the Eastern Seaboard from Tropical Storm Sara. The storm is expected to weaken after it passes through Central America this weekend.

USGS researchers have unveiled the first map of prospective locations for hydrogen gas in the contiguous United States — and there's a lot more than they previously thought.

On the Eastern Seaboard, a punishing combination of heat and humidity has triggered excessive heat warnings stretching from northeast North Carolina, through Virginia Beach, Richmond, Washington ...

East Coast Several cities along the Eastern Seaboard were placed under a code orange air quality alert, including major metropolitan areas like New York City, Atlanta, Baltimore and Philadelphia.

Trillions of cicadas in Broods XIX and XIII are expected to emerge in over a dozen states in the coming weeks. Here's where you can find them.

Maps show where extreme humidity and 90- or 100-degree temperatures will affect about 255 million people across the United States.

A swath of heavy rain and increasing winds is profoundly impacting travel in the eastern part of the United States Sunday as a storm intensified and traveled northeastward.

Online map tools and resources let you track the Canadian wildfires and monitor poor air-quality conditions, which are impacting US states.

Severe thunderstorms will advance into the southern and eastern United States into this weekend, continuing a multiday outbreak of severe weather that has already spawned multiple tornadoes and ...