Arizona Watcher
An intense heat wave across the desert Southwest has pushed more people into Phoenix emergency rooms, with temperatures approaching 115°F producing cases from dehydration to life-threatening heat stroke.
Dr. Paul Pugsley, ED medical director at Valleywise Health, says clinicians are seeing a broad range of heat-related ailments — from heat rash and cramps to severe heat stroke that can require prolonged care.
Extreme heat is aggravating chronic illnesses like heart disease, asthma and some mental illnesses, making younger patients with comorbidities as vulnerable as older adults; low-income and unhoused residents face heightened exposure.
Emergency departments must triage high volumes of relatively mild heat illness while also treating intermittent severe heat-stroke cases that need careful monitoring or intensive interventions, creating logistical strain.
City leaders are expanding public cooling options, adding more cooling stations across Phoenix and opening the first overnight downtown facility to provide relief for unhoused and low-income residents.
Preliminary 2025 data show heat-related deaths in Arizona fell to 667 from 997 in 2024, with Maricopa County deaths dropping to 427; over 46,600 people are subscribed to state heat-alert notifications.
Responses include a governor-ordered workplace heat-safety task force, strengthened protections, and a Valleywise-published cold-water immersion protocol for rapid cooling of severe heat-stroke patients.
Emergency departments in the Phoenix area are treating a growing number of patients for heat-related conditions as an intense desert heat wave grips the Southwest. Physicians say dehydration, heat rash, cramps and full-blown heat stroke are increasingly common, and officials…