5 Key Takeaways

• 1

  In 2023, record heat waves in the U.S. significantly impacted public health, particularly among vulnerable groups.

• 2

  The CDC reported 119,605 heat-related illness emergency department visits from May to September 2023.

• 3

  Daily rates of heat-related illness ED visits peaked in several U.S. regions and remained elevated for extended periods.

• 4

  Males aged 18–64 were more frequently treated for heat-related illnesses in emergency departments.

• 5

  The CDC issued public health alerts to address the surge in heat-related illness ED visits during extreme heat.