What is the test for a claim that a prison official has deprived inmates of humane conditions?

An Eighth Amendment claim that a prison official has deprived inmates of humane conditions must meet two requirements, one objective and one subjective. Lopez v. Smith, 203 F.3d 1122, 1132-33 (9th Cir. 2000) (en banc), quoting Allen v. Sakai, 48 F.3d 1082, 1087 (9th Cir.), cert. denied, 514 U.S. 1065 (1995). Under the objective requirement, the prison official's acts or omissions must deprive an inmate of the minimal civilized measure of life's necessities. Id. The subjective requirement, relating to defendant's state of mind, requires deliberate indifference. Id.