In this article, we examine the evolution of broker roles and their capacity to rapidly transmit emergency information within emergency networks. Using a social network analysis (SNA) approach, we analyze text data on collaborative ties among organizations that responded to the flood disaster in Henan Province, China in 2021. We explore how broker roles facilitate the quick dissemination of emergency information, drawing on structural hole and resource dependence theories. We find that the involvement of numerous national, provincial, and municipal participants from various categories of organizations indicates the establishment of a highly centralized emergency system in China, where government-led efforts play a pivotal role in emergency response. Additionally, as the emergency mission shifts from rescue to recovery, the Emergency Management Department continues to act as a broker, while the Education, Civil Affairs, and Development and Reform Department emerge as brokers due to their specialized expertise. Our research on broker roles provides valuable insights into the overall efficacy of emergency response efforts and aids in enhancing coordination among emergency managers, empowering them to develop strategies that bolster the overall resilience of the emergency network.