Section 28. The state fire warden appointed under section five of chapter twenty-one shall aid and advise the forest wardens and their deputies in towns and the municipal officers exercising the functions of forest wardens in cities in preventing and extinguishing forest fires and in enforcing the laws relative thereto. The forester may designate not more than fifteen assistants to aid the warden. The state fire warden shall report annually to the forester upon his work and upon the forest fires occurring in the commonwealth. This report shall be included in the report of the commissioner of environmental management relative to the acts of the forester.