When a situation of mass casualties develops (MCIs), being reactively strong enough is the only way EMS can cooperate reasonably and deal with the calamity. This piece of writing is a critical analysis of the current response plans to mass casualty incidents. It assesses their preparedness level in dealing with the plans, the mechanisms for organizing the response, and whether the strategy for resilience has been considered. This study intends to examine appropriate literature, find voids in knowledge, and synthesize the findings to broaden the understanding and offer competent insights for MCI responses in EMS.