The extension of extreme heat seasons poses significant risks to public health, agriculture, and ecosystems. In 2024, Maricopa County, Arizona, recorded 608 heat-related deaths, highlighting the human toll of prolonged high temperatures. Dry heat can devastate crops and natural habitats, while humid heat increases the risk of heat-related illnesses by impairing the body's ability to cool itself. Additionally, the overlap of extended heatwaves with other seasonal hazards, such as wildfires in the western U.S. or hurricanes in the southeast, could amplify their destructive impacts. These overlapping risks demand urgent attention to adapt existing safety measures and infrastructure to the changing climate.