The issue occurred on the Pimlico grounds, a city official told The Baltimore Sun. Melissa Hoppert of The New York Times reported that the issue stemmed from a water leak two miles away from the grounds, and track officials told The Baltimore Sun that there was a water main break two miles from the course.
A number of bathrooms were affected by the issue, with numerous toilets either unusable or backed up.
The 2015 Preakness is slated to begin at 6:18 p.m. ET on Saturday. American Pharoah is the favorite after winning the Kentucky Derby earlier this month.