The City of Arnold has a professional fire department provided by the Rock Community Fire Protection District, a government entity independent of city administrators. Five stations cover the Arnold and Imperial, an adjacent community. Department headquarters and the Fire Chief are located at 3749 Telegraph Road. Sixty-five professional firefighters—three battalion chiefs, 15 fire captains, 45 full-time fighters and two reserve fighters—cover the community.
- Hours: Emergency service is available daily, 24hrs by calling 911
- Founding Date: Professionally founded in 1970, volunteer service offered in 1941
- Number of firefighters: 45
- Fire department services: Engine, Ladder, Rescue
- Type: Professional