... razed to their foundations.

[Odessa Dawn]

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Rows of four- and five- and six-story buildings razed to their foundations.

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Is this an exaggeration? Does razed to their foundations mean razed to the ground. By the way, I didn't find this expression/phrase in dictionaries.

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[Tdol]

It's not a standard phrase, but I would interpret is as having the same meaning.