How an Arizona Medical Examiner Is Revolutionizing Heat-Related Death Tracking
As extreme temperatures sweep across the United States, Pima County medical examiner Greg Hess and his team in Arizona are pioneering advanced protocols to accurately count heat-related fatalities. This localized effort highlights a widespread national shortfall, as government agencies and researchers largely fail to formally track the true human toll of climate-fueled weather disasters.
Pima County Leads Forensic Battle Against Extreme Heat
Inside a Desert Morgue Facing Rising Seasonal Crises
Greg Hess deals with mortality on a daily basis. Operating in Pima County along the United States-Mexico border, his office processes roughly 3,000 cases annually, ranging from quiet deaths to overdoses and tragic accidents. Yet, between the months of April and October, Hess faces a distinct and escalating crisis: morgue drawers fill rapidly with individuals succumbing prematurely to extreme desert heat.
While Pima County is neither the most populous nor the absolute hottest jurisdiction in the country, Hess and his staff operate at the national forefront of forensic investigation. They have engineered innovative investigative strategies to properly identify and document fatalities driven by environmental exposure. Across the United States, the true mortality burden of climate-worsened disasters remains severely undercounted by official state and federal bodies.
The High Cost of Missing Public Health Data
Public health experts point to profound consequences stemming from this missing data. Kristie Ebi, a public health and climate epidemiologist at the University of Washington, emphasizes that the absence of reliable statistics extends far beyond statistical omissions. Without a precise tally of weather-related casualties, communities struggle to comprehend the complete impact of extreme events, impairing municipal planning and resource allocation such as the strategic deployment of cooling centers during dangerous heat waves.

Ebi notes that accurate figures are foundational for setting appropriate public safety priorities. As global temperatures climb toward unprecedented extremes, a diverse coalition comprising frontline forensic pathologists, epidemiologists, and public health officials is attempting to close the data gap. Their objective is to supply municipal leaders, policymakers, and safety advocates with empirical insights necessary to protect vulnerable populations.
Pathology on the Frontlines of Climate Extremes
Hess, an avid cyclist and regional pickleball champion who transitioned to forensic pathology out of an appreciation for the complex mysteries preserved within autopsy evidence, leads an office dedicated to uncovering these truths. His background includes a residency in Wisconsin and service as an Air Force doctor in California prior to taking the helm in Pima County.
