Which of the following is an appropriate action if the risk to firefighters increases?

Calling for increased resources is a critical action when the risk to firefighters escalates during an emergency response. This ensures that additional personnel, equipment, and support systems can be mobilized to enhance safety and effectiveness on the scene. By increasing resources, you can better manage the incident, provide coverage and support for the firefighters already engaged, and potentially mitigate the risks they face. It's essential to maintain safety and operational effectiveness, and having a larger, more equipped team means that challenges can be addressed more effectively.

Delay in resource allocation can compound problems, as it does not address the immediate safety concerns and may leave firefighters exposed to escalating risks. Continuing with existing efforts without bolstering resources can lead to firefighter fatigue, increased risk of injury, and potentially worse outcomes. Establishing a command post is vital for managing operations but does not directly address the increased risk faced by those already engaged in firefighting activities. Thus, mobilizing additional resources is the most immediate and effective action to take in response to heightened risks.