Pima County Medical Examiner Greg Hess at his office in Tucson, Ariz. Hess and another Arizona-based medical examiner are rethinking how to catalog and count heat-related deaths, a major step toward understanding the growing impacts of heat.

Pima County Medical Examiner Greg Hess at his office in Tucson, Ariz. Hess and another Arizona-based medical examiner are rethinking how to catalog and count heat-related deaths, a major step toward understanding the growing impacts of heat.

No one across the U.S. is consistently tracking climate-fueled deaths. One medical examiner has a new protocol on heat-deaths.

(Image credit: Cassidy Araiza for NPR)