The charge nurse on the renal unit is notified of a bus accident with multiple injuries, and clients are being brought to the emergency department (ED). The hospital is implementing the disaster policy. Which action should the charge nurse take first?

call any off-duty nurses to notify them to come in to work.

Determine which clients could be discharged home immediately.

Assess the staffing to determine which staff could be sent to the ED.

Request all visitors to leave the hospital as soon as possible.