Aaron Million

Luke Runyon / KUNC

The Colorado River is running low on water. The lifeline that slakes the thirst of 40 million southwestern residents is projected to hit a historic low mark within two years, forcing mandatory cuts to water deliveries in Arizona, Nevada and Mexico.   

Facing exceptional drought conditions, cities throughout the watershed this summer have imposed mandatory water restrictions, ranchers have begun selling off cows they’re unable to feed, and the river’s reservoirs are headed toward levels not seen since they filled decades ago.