Fire Danger Rating Area 2 : A geographical area, relatively homogeneous with respect to climate, fuels, and topography, for which the fire danger is constant
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}