After a fire incident, which action reflects utmost readiness for safety and security?

Setting a reflash watch is a proactive and immediate measure taken after a fire incident to ensure safety and security. This action involves monitoring the area for any signs of rekindling or flare-ups, which can pose significant danger if not addressed promptly. This vigilance is crucial in preventing a fire from reigniting, thereby protecting lives and property.

While the other actions mentioned contribute to overall safety and preparedness, they are more focused on long-term improvements or evaluations rather than immediate response. Planning future drills and reviewing past incidents are important for training and learning, and conducting a fire hazard evaluation aids in understanding potential risks. However, establishing a reflash watch directly addresses the immediate safety concerns following a fire, making it the most critical action for readiness in this context.