- Home
- Departments
- Public Health
- Community Health Data
- Heat Surveillance
Heat Reports
- The final version of the 2024 Annual Heat-Related Deaths Report (PDF) is now available.
On This Page
Heat-related illness and death data are updated weekly during the heat season on our online dashboard. An annual heat surveillance mortality report, multi-year morbidity reports and other heat-related data studies also are available.
Reporting time period is from Sunday to Saturday; the week ending is always a Saturday. Public Health tracks heat-related illness cases by MMWR weeks, which is a standard way across the United States of numbering weeks in a year to track disease.
Links to the online dashboard and heat-related PDF reports can be found below. Learn more about heat safety and preventing heat-related illness.
2025 Heat-related Illness and Death Dashboard
This dashboard displays best on larger screens. Please open the dashboard on a laptop or desktop for best experience.
Heat Death Data Definitions
| Total confirmed | Preliminary confirmed heat deaths (heat caused or heat contributed) based on official death certificate data. Death certificate data may be amended at any time if new, reliable, and pertinent information arises during an investigation by the Office of the Medical Examiner. In line with industry standards, it typically takes two to three months for OME to complete a medicolegal death investigation and confirm whether a death is heat related. |
| Heat caused | Deaths where heat exposure is listed as a direct cause of death on the death certificate |
| Heat contributed | Deaths where heat exposure is listed as a contributing factor on the death certificate |
| Under investigation | Includes all cases the Office of the Medical Examiner (OME) is investigating as potentially heat-related. This number represents the maximum possible number of heat-related deaths; however, it is unlikely that 100% of deaths under investigation will be confirmed as heat-related. |
Additional Data: Heat-Related Illness
Additional data are available on the dashboard on heat-related illness based on local emergency department and inpatient hospital visits among facilities that report to the CDC’s National Syndromic Surveillance Program’s BioSense.
About the Dashboard
This dashboard replaces weekly PDF heat surveillance reports previously published on this website prior to the 2024 heat season. Comparative data for heat-related deaths and hospital visits are provided for 2023 and 2024. Patient characteristics by age, race, and sex as well as housing status and substance use involvement are featured to demonstrate who is at highest risk from heat and inform prevention efforts.
Built using Power BI, the dashboard is optimized for desktop viewing. Power BI allows the user to zoom in and export individual data visualizations.
Public Health will continue to publish the annual heat mortality report and post it online for public viewing.
>
Yearly mortality reports
Browse through our current and past mortality reports.
- 2024 Annual Heat Report (PDF)
- 2023 Annual Heat Report (PDF)
- 2022 Annual Heat Report (PDF)
- 2021 Annual Heat Report (PDF)
- 2020 Annual Heat Report (PDF)
Multi-year morbidity report
- 2018-2022 Heat Morbidity report (PDF), Revised July 2024
- 2006-2017 Heat Morbidity Report (PDF)
Special studies
- 2023 Cooling Center Survey Report:
- General community feedback (PDF), Archived July 2024
- Visitor feedback (PDF), Archived July 2024
For data needs that cannot be found through the dashboard or other reports on this page, please use our Data Request Form.
-
Division of Epidemiology and Informatics
Phone 602-506-6767Fax 602-372-8935