Preparing for Extreme Heat: 6 Best Practices for Hospitals
Valleywise Health in Phoenix updated its heat-related illness protocols in 2021, shifting to cold water immersion after seeing hundreds of cases rise annually, while hospitals like University Medical Center of Southern Nevada in Las Vegas face surging heat stroke, burns, and cardiovascular events due to extreme temperatures. Hospitals are adopting proactive measures such as public education, proactive cooling strategies, and distributing protective supplies like flip-flops and sunscreen to vulnerable populations.
Valleywise Health, a Phoenix-based health system, revamped its approach to heat-related illnesses six years ago after observing a sharp increase in cases. By 2021, the system transitioned from passive cooling methods like ice packs and fans to cold water immersion, which rapidly lowers body temperature. The shift came as heat-related illnesses surged by hundreds annually, reflecting broader trends across the U.S. Extreme heat is becoming more common, with Accuweather reporting that by August 7, 2025, nearly every state except Michigan, Wisconsin, Illinois, Ohio, Indiana, and Vermont had reached triple-digit temperatures. Hospitals like University Medical Center of Southern Nevada (UMC) in Las Vegas, where temperatures frequently exceed 100°F for days, are treating severe cases of heat stroke, burns from hot pavement, and increased heart attacks and strokes due to heat stress. UMC’s medical director, Ketan Patel, notes that heat acts as a stress test for vulnerable populations, worsening pre-existing conditions. To mitigate risks, UMC launched initiatives like an annual flip-flop drive to prevent pavement burns, distributing protective footwear to patients, families, and underserved communities. The hospital also provides backpacks containing visors, sunscreen, and lip balm, prioritizing children, the elderly, and marginalized groups. Public education is another key strategy. UMC’s assistant chief nursing officer, Diane Knapp, emphasizes proactive outreach to inform communities about cooling measures, heat illness symptoms, and when to seek treatment. The hospital’s severe weather incident response guide includes protocols for protecting patients and staff during heat waves. Valleywise Health and UMC’s efforts highlight the growing need for hospitals to adapt to rising temperatures. Proactive measures—such as policy updates, public awareness campaigns, and supply distribution—are critical to reducing heat-related illnesses and injuries in high-risk populations.
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