Authorities and Hillsborough County Code Enforcement evaluated the structural damage to both buildings as the cause remains under investigation. Hillsborough apartment crashWhat we know:Investigators said the driver backed into an apartment building first, plowing right through the wall. The Hillsborough County Sheriff's Office states it appears the driver had a medical episode. Fire officials worked with Hillsborough County Code Enforcement to evaluate the structural stability of the damaged properties. And we did a pretty good job of getting those buildings evacuated in short order," Hillsborough County Fire Rescue public safety information chief Rob Herrin said.