There are three people visible in the image. One person is standing behind a fire truck, wearing a green shirt and holding a fire extinguisher. Another person is standing to the right of the fire truck, also wearing a green shirt and holding a fire extinguisher. The third person is standing near the fire truck, wearing a blue shirt and holding a fire extinguisher as well. All three individuals appear to be firefighters, and they are all wearing safety gear appropriate for their role.