Combustible dusts are fine particles that present an explosion hazard when suspended in the air in certain conditions. A dust explosion can be catastrophic and cause employee deaths, injuries and destruction of entire structures. In many combustible dust accidents, employees and employers were unaware that a hazard even existed. Combustible dust explosion hazards exist in a variety of industries, including the food (e.g. candy, spice, flour, feed), grain, sugar, and tobacco industries.