Research Letter

Trends and Disparities in Heat-Related Emergency Medical Services Activations

JAMA 10.1001/jama.2025.26586

February 04, 2026 at 11:00 AM EST

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This study compares US sociodemographic and geographic trends in heat-related and non–heat-related emergency medical services (EMS) activations from 2019 to 2024.

Corresponding Author: Chris Chaeha Lim, PhD, Mel and Enid Zuckerman College of Public Health, University of Arizona, 1295 N Martin Ave, Tucson, AZ 85724 (chrislim@arizona.edu).

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