Despite predicted wind chills as low as minus 20 degrees Fahrenheit Wednesday — and a petition with more than 8,500 signatures demanding Pitt cancel classes — the University of Pittsburgh does not plan to close Wednesday, according to Pitt spokesperson Joe Miksch.

The William Pitt Union briefly closed again after issues with a sprinkler Monday morning. The University released a comment via its official Twitter account at 5:53 a.m., saying the lower level and basement...