A fire department (North American English) or fire brigade (Commonwealth English), also known as a fire company, fire authority, fire district, fire and rescue, or fire service in some areas, is an organization that provides fire prevention and fire suppression services as well as other rescue services. (Wikipedia)

Fire departments are most commonly a public sector organization that operate within a municipality, county, state, nation, or special district. Private and specialist firefighting organizations also exist, such as those for aircraft rescue and firefighting. (Wikipedia)

A fire department contains one or more fire stations within its boundaries, and may be staffed by firefighters, who may be professional, volunteers, conscripts, or on-call. Combination fire departments employ a mix of professional and volunteer firefighters. In some countries, fire departments may also run an ambulance service, staffed by volunteer or professional EMS personnel. (Wikipedia)

Fire departments are organized in a system of administration, services, training, and operations; for example:

• Administration is responsible for supervision, budgets, policy, and human resources.

• Service offers protection, safety, and education to the public.

• Training prepares people with the knowledge and skills to perform their duties.

• Operations performs tasks to mitigate harm to persons, property, and the environment.  (Wikipedia)

A fire service is normally set up where it can have fire stations, fire engines and other relevant equipment strategically deployed throughout the area it serves, so that dispatchers can send fire engines, fire trucks, or ambulances from the fire stations closest to the incident. Larger departments have branches within themselves to increase efficiency, composed of volunteers, support, and research.

• Volunteers give additional support to the department in a state of emergency.

• Support organizing the resources within and outside of the department.

• Research is to give advantages in new technologies for the department.  (Wikipedia)