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Heat Wave Fuels Unexpected ER Visits
26 Aug
Summary
- High temperatures linked to more injuries and illnesses than expected.
- Accidental gunshot wounds increased over 30-fold on hot days.
- Extreme heat affects kidneys, skin, and mental health, study finds.

A comprehensive study analyzing over 900,000 emergency room visits in Chicago from 2011 to 2023 has identified a significant correlation between high temperatures and a wide array of health issues. Researchers found that on days when the temperature reached or exceeded 92.6 degrees Fahrenheit (33.7 Celsius), numerous medical conditions saw a marked increase.
Unexpectedly, certain injuries and illnesses not commonly associated with heat became more prevalent. Accidental gunshot wounds, for instance, saw an increase of more than 30-fold compared to cooler days. Other conditions, including unspecified injuries from assault, kidney-related complaints, and skin problems, also became more frequent.
The study also pointed to a rise in mental health issues linked to marijuana use during extreme heat. Experts suggest that physiological stress from heat can amplify the effects of certain substances. This broader impact underscores the need to consider heat waves as triggers for extra caution, especially for those with pre-existing chronic conditions.