Racine County Sheriff Deputies were called to Petro Truck Services at 923 S. Sylvania Ave for a rescue.
A Petro employee, a 32-year-old man, was injured while working on a 53-foot semi-trailer, deputies say.
The man became trapped under the semi and suffered serious injuries.
According to the sheriff’s office, other Petro employees provided aid to the man and removed him from under the semi.
The Union Grove Yorkville Fire Department responded to the scene and the man was transported to Froedtert Hospital by Flight for Life.
No additional details have been released at this time.