Blowup 4 : A sudden increase in the intensity or rate of spread of a fire such that direct control is impossible or existing plans are upset, often accompanied by violent convection that resembles a fire storm. See also: Blowup Fire
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}