Several floors of the Sam Nunn Atlanta Federal Center flooded Monday after a “significant leak” on an upper floor of the complex’s tower, forcing many employees who recently returned to their offices to work remotely.

Eleven floors within the tower were directly affected by the leak, which was caused by problems within a connection within the complex’s climate control system, according to a statement from a General Services Administration spokesperson. The GSA is the agency that oversees federal real estate. The rest of the complex was unaffected, the agency said.

Federal workers on the affected floors will be out of the building at least until Friday and possibly longer, according to the GSA.

The more than 1.5 million square foot complex, located at 61 Forsyth St. SW near the Fiv

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