A medical event was the cause of a single-vehicle accident East of Elma yesterday afternoon. The Washington State Patrol reports a 2018 Jeep Cherokee was Eastbound on State Route 8 just after 3 PM Monday. The driver, a 53-year-old Lacey man, suffered a medical event and his vehicle drifted off the road to the right striking a tree. The driver was airlifted to Harborview Medical Center with undisclosed injuries.