from the same report:

"Reports by advocacy organizations, including interviews with detainees and the DHS Office of Inspector General, have cataloged egregious conditions in many of the centers, including lack of bedding (eg, sleeping on cement floors), open toilets, no bathing facilities, constant light exposure, confiscation of belongings, insufficient food and water, and lack of access to legal counsel and a history of extremely cold temperatures"

(DHS stands for Division of Homeland Security)

Cold temperatures? Deserts get cold at night.