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 2019 season, there have been 133 cases of HRI in Denton County residents, with 3 of these cases observed in week 37. Seventy-six % of the reported HRI cases this season have been classified as Heat Exhaustion or Other Heat-Related Illness. Males between the ages of 18 and 35 continue to experience the largest amount of HRI cases among all age groups.


There have been 2 confirmed HRI deaths for the 2019 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.