The following link gives explanation for BLEVE (Boiling Liquid Expanding Vapor Explosion). The explanatory text below states that BLEVE is possible even with nonflammable liquids which should be noted. Many experts differ with this statement and they talk firmly that BLEVE is possible only with flammable substances. Though, the phenomena is same whether it is with flammable or non-flammable substances, I do not understand why some experts in the field differ about BLEVE with non-flammables. If the substance is flammable, then BLEVE is followed with a fireball, else no fireball. Thermal radiation from fireball can trigger secondary fires (domino) if flammables are present nearby.
http://my.firefighternation.com/video/bleve-explanation