"Fire nuisance" means anything or any act which increases, or may cause an increase of, the hazard or menace of fire to a greater degree than customarily recognized as normal by persons in the public service of preventing, suppressing, or extinguishing fire; or which may obstruct, delay, or hinder, or may become the cause of any obstruction, delay, or a hindrance to the prevention or extinguishment of fire.
[ 1961 c 228 § 10.]