The extreme heat affected millions across the United States, particularly in the East Coast, Midwest, and Colorado River Basin. Events such as parades and fireworks were canceled due to dangerous heat indices exceeding 110°F (43.3°C). States like Colorado, Utah, Arizona, and New Mexico experienced record-breaking temperatures, exacerbating drought conditions and impacting water reservoirs. The persistent high nighttime temperatures posed additional risks, especially for vulnerable populations such as the elderly and those without access to air conditioning.