Dr. Paul Pugsley, medical director of the emergency department at Valleywise Health Medical Center in Phoenix, explains, Monday, June 3, 2024, how his staff will be working on a new protocol being adopted by the Phoenix Fire Department across its jurisdiction this summer in hopes of preventing some deaths from heat stroke. Known as cold water immersion therapy, the technique involves placing a patient with heat stroke inside a bag of ice slurry to bring down their body temperature long before the person arrives at a hospital emergency room. (AP Photo/Anita Snow)