A nurse is caring for a client who has Graves' disease. Which of the following findings should indicate to the nurse that the client is developing a thyroid storm?

A. Tachycardia: This is correct. Tachycardia is one of the hallmark signs of thyroid storm, a life-threatening complication of hyperthyroidism (often seen in Graves' disease.. The excessive thyroid hormone leads to severe metabolic disturbances, including an increased heart rate. B. Hypotension: Hypotension is not typically a feature of thyroid storm. In fact, thyroid storm is more commonly associated with hypertension due to the increased heart rate and metabolic activity. C. Neck pain: Neck pain is not a common symptom of thyroid storm. Neck pain might be related to other conditions, such as thyroiditis or a goiter, but not specifically thyroid storm. D. Respiratory depression: Respiratory depression is not a typical symptom of thyroid storm. On the contrary, thyroid storm often leads to symptoms like hyperventilation, not depressed breathing.