What is the correct first step when communication is lost during operations?

When communication is lost during operations, the correct first step is to restore the communication link. This action is critical because maintaining clear lines of communication is essential for the coordination and safety of all personnel involved in hazardous materials operations. Communication not only aids in operational effectiveness but also ensures that all responders are informed of any changes in the situation, including potential hazards and safety protocols.

While using hand signals can be a method to communicate temporarily when verbal communication is not possible, it should not be the first action taken when communication is lost. Hand signals are limited in effectiveness and can lead to misunderstandings without a clear communication framework. It is more prudent to focus on re-establishing reliable communication systems as the priority. Similarly, proceeding to the warm zone or exiting the hot zone may not be appropriate actions to take without understanding the situation fully, which underlines the importance of effective communication in operations.