It is the duty of the commissioner of commerce and insurance, or the commissioner's deputies or assistants, to enforce the laws and this chapter in the counties, relating to the:
(1) Prevention of fires;
(2) Storage, sale and use of combustibles and explosives;
(3) Installation and maintenance of automatic or other fire alarm systems and fire extinguishing equipment;
(4) Construction, maintenance and regulation of fire escapes; and
(5) Means and adequacy of exit, in case of fire, from factories, asylums, hospitals, churches, schools, halls, theaters, amphitheaters, and all other places in which numbers of persons live, work or congregate, from time to time, for any purpose or purposes.
(6) [Deleted by 2019 amendment.]