A government shutdown is causing flight delays due to air traffic controller staffing issues. Air traffic controllers are working without pay, which an expert says adds significant stress to a high-pressure job.

Orlando Airport turned away all flights due to air traffic controller shortage during government shutdown. The major hub serving Disney World faced a staffing crisis.

Departures to Orlando International Airport are delayed an average of 2.7 hours overnight Thursday due to staffing issues, the Federal Aviation Administration said.

Airports are still reeling from the impacts of the continuing government shutdown, and Orlando International Airport in Florida is the latest hub to feel the effects. A ground delay was issued Thursday evening for Florida’s busiest airport,

The FAA is preparing for more possible ground stops and delays at several major airports amid air traffic controller shortages in the government shutdown.