Hospital census fluctuates constantly. The managers try to keep as many beds full as they can staff--important point there. If there isn't staff they can't have more patients. Patient load is only roughly predictable. Anything that would suddenly increase usage by a small percentage in a hospital with a money-making amount of patients, i.e. close to full, will cause a temporary overload, which the hospital usually deals with by sending the least sick home or to a care facility. By cherrypicking the time of assessment you could make a case that a hospital was overloaded, or not.