Heavy rain Sunday afternoon caused a semi-tractor to leave the roadway. The semi was on the ramp from I-43 northbound to Highway 172 westbound, when it began to hydroplane. The unit then slid off the roadway, and fell into a body of water, becoming partially submerged. The water was reportedly around 5 feet deep, making rescue a challenge, but no scuba gear was necessary. The driver was treated for minor injuries before being transferred from the scene.