The nurse is caring for a patient who came to the emergency department with confusion and muscle cramps after working outside on a hot day. What is the priority action of the nurse?

A. Remove fans to prevent premature chilling. While preventing rapid cooling is important in some cases, this action is not the priority. The patient’s symptoms suggest heat-related illness, which requires immediate assessment.
B. Apply a hyperthermia blanket to lower temperature slowly. Hyperthermia blankets are typically used in controlled environments for gradual cooling, but first, the patient’s temperature must be assessed to determine the severity of heat-related illness.
C. Take the patient's temperature and vital signs. Confusion and muscle cramps after working in heat suggest possible heat exhaustion or heatstroke, which can be life-threatening. Assessing temperature and vital signs is the priority to determine the severity and guide further treatment.
D. Place the patient in a tub of iced water. Ice water immersion is appropriate for severe heatstroke with a dangerously high core temperature, but cooling measures should only be initiated after confirming hyperthermia with a temperature assessment.