PHX Reporter

The Maricopa County Department of Public Health (MCDPH) has published its preliminary report for 2024, indicating a decline in heat-related deaths for the first time in a decade. The report confirms 602 deaths due to environmental heat, with eight cases still under investigation. This marks a decrease from the record 645 deaths reported in 2023, despite experiencing the hottest summer on record.

Thomas Galvin, Chairman of the Maricopa County Board of Supervisors, District 2, stated, “While this reduction in heat deaths is a step in the right direction, we need to continue educating residents about the dangers of extreme heat and the steps they can take to stay safe and protect their loved ones.” He emphasized that each death is preventable and reiterated Maricopa County's commitment to reducing these numbers further through community partnerships.

In 2024, Maricopa County faced an intense heat season with Phoenix enduring 113 consecutive days of temperatures at or above 100°F from May 27 to September 16. Those most affected by extreme heat include people experiencing homelessness, older adults, and individuals who use substances. Among the substance-involved deaths, stimulants were present in 89% of cases.

Dr. Nick Staab, chief medical officer for MCDPH, noted that “heat is a force multiplier for many underlying health conditions,” exacerbating symptoms like dehydration and increased heart rate which can lead to severe complications or death.

Key findings from the report reveal that between June 18 and July 31, at least one heat-related death occurred daily in Maricopa County. During this period, there were 14 excessive heat warnings issued and as many high-temperature records broken. More than half of all heat-related deaths happened on days when the heat risk was moderate. Notably, among indoor fatalities where air conditioning units were present but non-functional accounted for a significant portion.

Looking ahead to 2025, MCDPH plans to support prevention efforts addressing gaps in access to heat relief resources. Initiatives include agreements with cities such as Phoenix and Glendale to extend hours at heat relief sites and contracts with organizations for water distribution and support at cooling centers.

Dr. Staab emphasized that “heat deaths are preventable” and encouraged residents to take proactive measures like checking on vulnerable neighbors and staying hydrated.

A comprehensive report with final data will be released once all investigations are complete by Spring 2025. For more information on related illnesses and data visit Maricopa.gov/heat.