"Mega-drought" takes dramatic toll on Colorado River system that provides water to 40 million...

"Scientists are calling it a "mega-drought" brought on by climate change.
The latest U.S. Drought Monitor Map shows large areas of the Southwest are "exceptionally dry," the worst category.
It's taking a dramatic toll on the Colorado River system that provides water to 40 million people in seven states — and may force the federal government to make a drastic and historic decision."