When dealing with a hazardous materials spill in the cabin, what is the first step?

Isolating the area and notifying the flight deck immediately is crucial when dealing with a hazardous materials spill in the cabin. This step is important because it ensures the safety of both crew and passengers by preventing further exposure to the hazardous substance. By isolating the area, the spread of any potential danger is minimized, allowing for better control of the situation.

Notifying the flight deck is essential as they need to be aware of the incident to assess the severity of the situation and determine the best course of action. This may include preparing for an emergency landing if the spill poses a significant threat to cabin safety or initiating the appropriate emergency procedures. Quick and effective communication between the cabin crew and flight deck can significantly enhance the response to a hazardous situation, ensuring that all necessary measures are taken to maintain safety on board.