Flare-Up 2 : Any sudden acceleration in rate of spread or intensification of the fire. Unlike blowup, a flare-up is of relatively short duration and does not radically change existing control plans
Penn Hills Wildland Crew, Pennsylvania Bureau of Forestry Division of Forest Fire Protection, Wildland Firefighting Glossary, Terms & Definitions, Washington, DC, USA 2007. http://home.epix.net/~nooyawka/glossary.htm, (For Fr - Amer) {845}