Let’s Talk New Mexico 6/3 at 8 am: The Rio Grande is swelling right now, but looks can be deceiving. Climate change is drying out this lifeline in the high desert. The river is a highly managed water system, so flows are supplemented and the impacts of global warming aren't always immediately visible. But climate change is taking its toll, and local managers say those miles-long dry patches we’ve been seeing could grow larger and last longer. The annual flows may drop even further, leaving thirsty cottonwood trees, parched ecosystems and dry farms.