Heat-Related Illness Surveillance Report

Denton County Heat-Related Illness Surveillance

Although Heat-Related Illnesses (HRIs) are not reportable conditions in the state of Texas, Denton County Public Health conducts syndromic surveillance for HRIs during the summer months. An HRI occurs when the body is unable to cool itself properly, resulting in conditions such as heat stroke, heat exhaustion, heat cramps, sunburn, and even death.

In Denton County

To date in the 2022 season, there have been 55 cases of HRI in Denton County residents, with 19 of these cases observed in week 25. The leading cause of reported HRI cases this season is other heat-related illness (which includes heat-related overexposure, rash, stress, and malaise) at 47% followed by heat exhaustion at 25%. Males between the ages of 18 and 35 have experienced the largest amount of HRI cases among all age groups.


There have been zero confirmed HRI deaths for the 2022 season. Heat deaths are included in the report after they have been confirmed by a medical examiner.

HRI Illness Report

View the weekly HRI Illness Reports.