N.Y. Correct. Law § 25
In cooperation with the development and operation of plans for mutual aid in cases of fire and other public emergencies, the warden or superintendent of any state institution in the department, with the approval of the commissioner, may authorize the fire department of the institution to furnish aid to such territory surrounding the institution as may be practical in cases of fire and such emergencies, having due regard to the safety of the incarcerated individuals and property of the institution and to engage in practice and training programs in connection with the development and operation of such mutual aid plans. Any lawfully organized fire-fighting forces or firefighters from such surrounding territory may enter upon the grounds of the institution to furnish aid in cases of fire and such emergencies.
N.Y. Correct. Law § 25