Fast and intense fire in a chimney flue in which accumulated creosote and other combustion byproducts ignite. These often extend fire into the roof or attic, especially with defective chimneys or when the mortar becomes hot enough to melt
Wikipedia, The Free Encyclopedia, Glossary of firefighting terms, Wikimedia Foundation, CA, USA 2012. http://en.wikipedia.org/wiki/Glossary_of_firefight ing_terms, (Fr Srvc - Amer) {510}