Several reports say unusually high temperatures are contributing to operational problems that can delay flights. Hotter weather can affect airport and airline ground operations, including aircraft preparation and safety-related procedures. As temperatures rise, airlines may need additional time for activities such as turnaround processes and managing aircraft systems that can be impacted by heat. The resulting schedule impacts can be felt across departure times, with some flights taking off later than planned. In addition, heat can worsen congestion effects, since delays can cascade when multiple aircraft and crews are operating on tight schedules. The reporting indicates that the likelihood of delays increases during heat waves or periods of sustained extreme temperatures, particularly at airports where weather conditions change quickly during the day. While airlines and airports continue to monitor conditions and adjust plans, the reports collectively describe rising temperatures as a factor that makes on-time performance harder to maintain, leading to more frequent departures running behind schedule.