The rank-and-file members of the Chicago Teachers Union have voted to temporarily transition to remote learning, a move that prompted Chicago Public Schools officials to cancel classes for Wednesday.

While CTU instructed its members to work remotely Wednesday, CPS has said that it will not accept the switch back to remote learning, and instead canceled all classes, sporting events and extracurricular activities scheduled for Wednesday.

Food service will still be available at schools between 9 a.m. and 12 p.m., and COVID testing and vaccination events will continue as scheduled, according to a CPS press release.

While the union argues that the switch to remote learning would be temporary, and would be undertaken to help keep students and staff safe amid a surge in omicron cases, officials have said that the move is an “illegal work stoppage,” and said that they do not intend to switch the entire district to remote learning.