Rear (of a Fire) : (1) That portion of a fire spreading directly into the wind or down slope. (2) That portion of a fire edge opposite the head. (3) Slowest spreading portion of a fire edge. Also called heel of a fire
National Wildfire Coordinating Group (NWCG), Glossary of Wildland Fire Terminology, NWCG Program Management Unit, National Interagency Fire Center, Boise, ID, USA 2014. http://www.nwcg.gov/pms/pubs/glossary/pms205.pdf, (For Fr - Amer) {45}