U.S. — Public health experts emphasize the risks of extreme heat and the need for enhanced protections and increased access to cooling resources. Scorching temperatures, particularly when combined with high humidity, pose risks for children, older people, and individuals with certain health conditions, though anyone can suffer from heat-related illness.

Climate change is intensifying heat waves and heat stress. Heat can impact labor productivity and increase emergency room visits. Ashley Ward, director of the Heat Policy Innovation Hub at Duke University, said, "Your body needs a reprieve." She added, "You don't get that overnight, we start the next day at a deficit." Ward also noted that when overnight temperatures remain above 75 degrees Fahrenheit (24 degrees Celsius), "you start to see some pretty extraordinary outcomes with respect to heat illness and heat stroke, and even mortality."

Some communities establish cooling centers. Public places with air conditioning, such as movie theaters, malls, and libraries, can offer relief from heat. The Low-Income Home Energy Assistance Program may assist individuals in purchasing a window air conditioning unit, depending on their location, according to the National Council on Aging. Additionally, some local nonprofits and civic organizations provide aid for buying air conditioning units.

Bharat Venkat, director of the University of California, Los Angeles Heat Lab, discussed workplace conditions. He stated, "Most workers don't actually have control over their time or control over where they work." Washington, Oregon, California, Nevada, Colorado, Minnesota, and Maryland have implemented workplace protections related to heat, as reported by the Natural Resources Defense Council.

Understanding the signs of heat illness is crucial, as symptoms can vary among individuals. Medications or existing health conditions can affect the body's ability to regulate temperature or detect overheating. Early indicators of heat illness include heavy sweating, muscle cramps, and headaches. Symptoms of heat exhaustion can involve a faster heart rate and dizziness, while heat stroke may manifest as confusion, slurred words, and fainting. To help lower body temperature, measures such as wetting clothing or applying cold water or a cold rag to hands, feet, armpits, and neck can be effective. Using a portable handheld fan or a cooling vest can also assist in temperature reduction. Ward advised, "Don't be embarrassed to call 911 or go to urgent care when you think you might have overdone it in the heat."