After a blast incident, the responders' primary responsibility should be to:

In the context of disaster response, after a blast incident, the primary responsibility of responders is to conduct a survey. This involves assessing the scene for safety hazards, identifying potential sources of additional danger (such as gas leaks or unstable structures), and evaluating the extent of damage and injuries. Conducting a survey allows responders to gather crucial information that guides their next steps in the response effort.

This initial assessment is vital because it informs search and rescue operations and helps prioritize resources and medical assistance. By surveying the scene, responders can determine the severity of the situation and implement appropriate measures to avoid further casualties.

In contrast, while search and rescue is essential, it should be informed by a thorough understanding of the environment. An alarm is part of alerting individuals and authorities but is not the immediate responsibility of responders already on the scene. Providing medications is crucial but comes after evaluating the safety and needs of the victims, which first requires a comprehensive survey of the situation.