Airports in hot climates or at high elevations, such as Phoenix, Las Vegas, and Denver, are particularly vulnerable to heat-related disruptions. Passengers may face delays, cancellations, or requests to voluntarily deboard flights. Airlines may also need to carry less fuel, requiring additional refueling stops. These measures, while ensuring safety, can lead to significant travel inconveniences. The urban heat island effect exacerbates the issue, as airport infrastructure absorbs and retains heat, further elevating temperatures.