Natural variability can explain much of Earth's average temperature variation since the end of the last ice age, but over the past century, global average temperature has risen from near the coldest to the warmest levels in the past 11,300 years.

Flash floods scoured Phoenix and surrounding areas on September 8, 2014. How did the rainfall totals compare to normal September precipitation?

Earth’s hottest periods occurred before humans existed. Those ancient climates would have been like nothing our species has ever seen.

The Arkansas Valley is enduring the driest continuous period in Colorado's history of recorded data, recalling conditions the state's southeastern plains experienced during the Dust Bowl.

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