In Mexico’s dry north, Colorado River adds to uncertainty

A man walks between a canal carrying water from the Colorado River and a border wall separating San Luis Rio Colorado, Mexico with San Luis, Ariz., on Sunday, Aug. 14, 2022, in San Luis Rio Colorado, Mexico. Steep water cuts to U.S. states using Colorado River water are looming, which means that Mexico could face more cuts, too. (AP Photo/Gregory Bull)

Jose Garcia works to remove a broken blade on a plow on a farm irrigated with water from the Colorado River, Sunday, Aug. 14, 2022, near Los Algodones, Mexico. Steep water cuts to U.S. states using Colorado River water are looming, which means that Mexico could face more cuts, too. (AP Photo/Gregory Bull)

Adan Vallejo blocks water with mud as he irrigates a field of cotton with water from the Colorado River, Sunday, Aug. 14, 2022, near Ejido Mezquital, Mexico. Steep water cuts to U.S. states using Colorado River water are looming, which means that Mexico could face more cuts, too. (AP Photo/Gregory Bull)

Low water levels are visible at the El Carrizo reservoir Monday, Aug. 15, 2022, in Tijuana, Mexico. Steep water cuts to U.S. states using Colorado River water are looming, which means that Mexico could face more cuts, too. (AP Photo/Gregory Bull)

$Jose Garcia pours water on bolt as he works to remove a broken blade on a plow on a farm irrigated with water from the Colorado River, Sunday, Aug. 14, 2022, near Los Algodones, Mexico. By the time the Colorado River reaches Mexico, just a fraction of its water is left for the fields of the Mexicali Valley and millions of people in northwestern desert cities. (AP Photo/Gregory Bull)$

$Adan Vallejo blocks water with mud as he irrigates a field of cotton with water from the Colorado River, Sunday, Aug. 14, 2022, near Ejido Mezquital, Mexico. By the time the Colorado River reaches Mexico, just a fraction of its water is left for the fields of the Mexicali Valley and millions of people in northwestern desert cities. (AP Photo/Gregory Bull)$ $Water from the Colorado River flows in a canal along a border wall separating San Luis Rio Colorado, Mexico with San Luis, Arizona on Sunday, Aug. 14, 2022, in San Luis Rio Colorado, Mexico. By the time the Colorado River reaches Mexico, just a fraction of its water is left for the fields of the Mexicali Valley and millions of people in northwestern desert cities. (AP Photo/Gregory Bull)$