Extreme heat linked to surge in emergency room visits

Recent research highlights the significant impact of temperature fluctuations on emergency medical services. A study from Northwestern University, which analyzed nearly one million emergency room and urgent care visits in Chicago from 2011 to 2023, identified 33 unexpected health conditions associated with extreme heat. Beyond heatstroke and dehydration, these include acute kidney failure, skin rashes, multiple sclerosis exacerbations, mental health disturbances, and even increased rates of traffic accidents and firearm injuries when temperatures exceed 33.3°C.

Complementary research conducted by the Euro-Mediterranean Center on Climate Change (CMCC) in Mexico provides further evidence of this trend. Analyzing 14 years of public hospital records from 2008 to 2022, researchers found that when daily average temperatures exceed 30°C, emergency room visits increase by approximately 3.6% to 3.7% compared to milder days. Conversely, colder days were associated with a decrease in emergency visits. The study suggests that the relationship between temperature and emergency department access is essentially linear, indicating that climate change will likely lead to increased pressure and costs for public healthcare systems.