Or perhaps the question should be: When will the cloud burst?

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On July 2, 2011, a cloud burst inundated Copenhagen with 6 inches of rain in less than three hours, flooding cellars, streets, and key roads.

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This week, the cloud burst.

ECONOMIST: Just when it looked safe

Will the cloud burst?

FORBES: Cloud Computing: Who is Picking Up the Check?

But I do worry that some day the cloud fairy will turn into the wicked cloud fairy of the west and start charging me for every post, or that the cloud will burst and my data will become inaccessible, which is why I keep a copy of everything I post on my own server (and then I back that up).

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Donald Lamb of the University of Chicago and his colleagues think it might be just a dust cloud reflecting the glow of the burst, which is therefore nearby.

ECONOMIST: A symphony in gamma major