Some specialized firefighters parachute from airplanes when necessary to reach inaccessible areas. Most fire departments have a fire prevention division, usually headed by a fire marshal. Fire inspectors conduct inspections of structures to prevent fires and ensure fire code compliance. These firefighters may also work with developers and planners to check and approve plans for new buildings. Fire prevention personnel often speak on these subjects before public assemblies and civic organizations.
Some firefighters become fire investigators, who determine the origin and causes of fires.
They collect evidence, interview witnesses, and prepare reports on fires in cases where the cause may be arson or criminal negligence. Some investigators have police powers and may arrest suspects. They may also be called upon to testify in court. Between alarms, firefighters participate in educational activities. In addition to taking classes themselves, they sometimes give lectures or demonstrations on safety issues to the local community.