The FAA will temporarily limit the hours that commercial space launches can take place, citing strains on airspace during the government shutdown.

The federal government shutdown, now in its 38th day, prompted the Federal Aviation Administration to issue a temporary emergency order Thursday prohibiting commercial rocket launches from occurring during “peak hours” of air traffic.

As the FAA begins grounding flights due to the government shutdown, workers who maintain the nation’s critical aviation systems say if they’re not paid soon, they may be forced to leave—potentially gridlocking U.

Secretary Duffy said there will be a 10% reduction in capacity at 40 locations across the country as staffing shortages strain the FAA amid the longest government shutdown in history.