The Federal Aviation Administration on Friday delayed flights at airports in Austin, Newark and Nashville as air traffic control staffing problems continue to snarl flights and a government shutdown hits its 31st day.

A surge in callouts among air traffic controllers "is straining staffing levels" at multiple airports across the U.S. -- including in the New York City area where 80% of controllers are absent, the Federal Aviation Administration said Friday evening.

Transportation Secretary Sean Duffy said Friday he expects more flight delays and disruptions over the next week.

The dramatic announcement is a stark indication of growing stress on air traffic controllers on the 30th day of the shutdown and a sign of mounting strain on U.S. aviation. Orlando is the 9th busiest airport in North America and serves millions of tourists and others annually in central Florida.

The FAA issued another ground delay in Nashville on the morning of Oct. 31 because of the ongoing air traffic controller shortage. What to know:

The FAA is investigating an apparent close call at Logan Airport Thursday involving a Delta Air Lines flight that was landing and a Cape Air plane that was taking off.

Air traffic controllers struggle without paychecks during 27-day shutdown. Expert predicts travel chaos similar to 2019 unless government reopens soon.

Passengers at Newark Liberty International Airport in New Jersey can expect flights to be delayed by an average of 40 minutes, the FAA said.

For certain workers at the Federal Aviation Administration, the government shutdown hit hardest this week with a $0 paycheck.

John F Kennedy International Airport is under a ground stop until 7:30 p.m. Friday due to staffing shortages, New York City Emergency Management said. The airport is also on a ground delay through early Saturday morning due to high winds and staffing.