Water in the building is never a good sign. Some damage has already been done but the longer the water stays in the building, the more damage it is likely to do from corrosion and mold. When the water needs to be removed, a robust flood mitigation pump is needed.
FM Approved flood mitigation pumps are tested to verify they will operate for prolonged periods of time to make certain that the water is removed from the building. Decades of certifying fire pumps has taught FM Approvals how to evaluate flood mitigation pumps to determine they will function as designed should they be called upon.