[LouieFisk]

“Yep. “Empty” or nearly empty tanks are much more dangerous than full ones thanks to the vapour/oxygen combination.”
—
Something like grain elevators, it’s the grain dust that can go “boom!”.

[Jumper]

I repaired grain elevators in Ohio as a High School kid doing State farm labor....

[Newbomb Turk]

I saw the military blow up a WWII era bomb storage bunker with a 100 pound bag of flour and a secondary explosion to light off the flour dust after the initial blast inside the bunker.

Nothing more than a man made grain dust explosion.