Extreme heat poses significant risks to air travel, particularly in cities like Phoenix, Las Vegas, and Denver, where high temperatures are becoming more frequent. Passengers may face delays, cancellations, or weight restrictions, impacting travel plans and increasing operational costs for airlines. The urban heat island effect exacerbates these challenges, making airports some of the hottest areas in cities. Projections suggest that by mid-century, weight restrictions could affect 10% to 30% of flights during peak heat hours, especially if greenhouse gas emissions continue to rise.