As temperatures continue to rise this summer, the U.S. is experiencing increasingly worse drought conditions with more than 93% of land in seven Western states affected. Though this decades-long dry spell is concentrated in the Western part of the country, droughts have widespread consequences, affecting everything from our national food supply to water quality.  With the help of hydrologists and innovators on the ground and in the lab, Dr. Alok Patel learns about the traditional ecological knowledge of the Navajo Nation in the especially hard-hit Southwest. And he speaks with innovators applying advanced technology to agricultural practices, like drone surveillance and artificial intelligence, to prepare for and cope with drought.  Learn more about NOVA and subscribe to our YouTube channel.