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A heat wave hit much of the central U.S. over the weekend, while snow and cool temperatures arrived in the Northwest.

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

More than 200 million Americans are under extreme heat alerts” not a prediction for the future, that’s the reality enveloping ...

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

Enjoy this cool animated map that shows the formation of the United States, territory by territory, from its first incarnation to the incorporation of Hawaii on August 21, 1959. Make sure to click ...

With “States,” the teacher is Brian Unger, and he really is all over the map. Each episode, which started a 10-week run May 3, looks at how states’ boundaries came to be.