Arizona’s Maricopa County has reported a staggering number of heat-related deaths this summer, with nearly 500 fatalities making 2023 the deadliest year on record for extreme temperatures in the region (source: NBC News). According to the latest weekly heat report from the Maricopa County Department of Public Health (source: Maricopa.gov), there have been 469 confirmed heat-associated deaths so far, with an additional 153 still under investigation. These numbers surpass the previous record set last year, which saw 425 heat-associated deaths in the county.
Extreme heat is the leading cause of weather-related deaths in the United States, surpassing floods, hurricanes, and tornadoes (source: National Weather Service). The threat of heat-related deaths is expected to worsen in the future due to climate change, as studies have shown an increase in the frequency, severity, and duration of extreme heat events.
Arizona and other parts of the Southwest endured weeks of scorching temperatures this summer, with Phoenix, located in Maricopa County, experiencing a record-breaking streak of 31 consecutive days with temperatures surpassing 110 degrees Fahrenheit (source: NBC News). Maricopa County also saw a significant spike in heat-related deaths when temperatures reached nearly 120 degrees. Within one week, from July 16 to July 22, there were approximately 150 heat-related deaths in the county.