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Toxic cloud? Fertilizer plant burns in Germany

Andreas Drabben / AFP - Getty Images

Flames and smoke rise from a burning storage building of a fertilizer plant in Krefeld, western Germany, on Sept. 25.

Martin Gerten / AFP - Getty Images

A woman with a pram and a dog walks past dark smoke clouds rising from a burning storage building of a fertilizer plant in Krefeld, western Germany, on Sept. 25.

A large plume of black smoke caused by a fire burning at storage building at a fertilizer plant in Krefeld, Germany filled the skies on Tuesday. Fire officials are concerned about the cloud being toxic and have asked residents to keep their windows closed and stay indoors.