Colorado_River-Adrille Wikimedia Commons.jpg

Over the last five decades, water from the Colorado River rarely has reached the delta, which used to feed the Sea of Cortez just south of the border between the U.S. and Mexico. (Photo: Adrille/Wikimedia Commons) Over the last five decades, water from the Colorado River rarely has reached the delta, which used to feed the Sea of Cortez just south of the border between the U.S. and Mexico.