The National Weather Service urged people to avoid travel if a flash flood warning was in place for their area.

Seattle's downtown waterfront experience has dramatically improved. Here’s a guide to Overlook Walk, waterfront restaurants, ...

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

Relatively low humidity is in town. Rain chances are very low through the holiday weekend with near normal temperatures.

Temperatures will surge well into the 90s across the Northeast and Mid-Atlantic early next week as another wave of hot and ...

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

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

An air quality map shows conditions improving across the United States on Friday as smoke from the Canadian wildfires subsides after prompting air quality alerts and advisories in several states ...

Astronomy has lost one of its most assiduous calculators of eclipses with the passing of astronomer Fred Espenak, known widely as "Mr. Eclipse." ...

Each summer, along the coastal waters of the United States, a fascinating migration unfolds as hammerhead sharks arrive in significant numbers. These distinctive predators, known for their uniquely ...

This time, billions of them will hit in at least 12 states, experts say. This brood, Brood XIV, is considered the second largest periodical cicada brood, according to the University of Connecticut.