Michigan State Police have confirmed the situation involves chlorine exposure.
Mercy Health officials say there are nine total patients at Mercy and Hackley hospitals, all in fair condition.
Several emergency crews were seen entering the theme park just before 4 p.m., witnesses tell FOX 17.
The White Lake Fire Authority has confirmed that they’re also responding to the medical emergency at Michigan’s Adventure.
No other details are available at this time.
FOX 17 has crews on the scene and will provide you with the latest information here.