Less than a week after the passing of Anne Heche, the L.A. County Coroner's Office has revealed her cause of death.

The actress died Aug. 11 at the age of 53 after five days in the hospital following her involvement in a fiery car crash. The coroner's office has officially ruled her death an accident as a result of inhalation and thermal injuries, with a secondary cause of a sternal fracture due to blunt trauma also listed.

A full investigative report from the coroner's office is still pending.