Fifth : alarm Traditionally, the last and most serious alarm struck, requiring all the fire fighters and equipment available to a fire department; this is now giving way to expanded alarm systems. See also: General Alarm
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}