I saw this article and thought it was very interesting. We have all heard of the danger with grain elevators because of the dust exploding. Makes sends powdered mild would be the same. But, how many of us would have thought of it?
Original story here.

Dairy Processor Has Exploding Powdered Milk
Exploding Milk Started Fire, Officials Say

POSTED: 5:52 pm PDT October 28, 2008
UPDATED: 5:55 pm PDT October 28, 2008
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VISALIA, Calif. -- Fire investigators are trying to determine how powdered milk exploded at a processing plant, sparking a two-alarm fire.

Seven fire engines responded to California Dairies Inc., where an explosion Monday blew a hole in the side of a powdered milk processing building and forced the evacuation of 200 employees.

One employee suffered heat exhaustion while helping firefighters navigate the building.

Visalia Fire Chief Mark Nelson said the employee was treated and released at a local hospital.

The fire caused $200,000 in damage to the plant and equipment. Nelson speculated that a spark ignited the milk powder.