The “Internet Plus” era has significantly reshaped public crisis management paradigms. This study systematically analyzes a major extreme rainstorm disaster to explore enhancement priorities for the contemporary emergency management systems. Key development areas include advancing risk governance frameworks, strengthening emergency response capacities, accelerating the integration of modern information technologies (e.g., big data analytics), optimizing interdepartmental coordination mechanisms, improving early warning systems, and adapting legal and regulatory frameworks. To address these priorities, multidimensional optimization pathways are proposed: (1) Cultivating robust risk governance competencies and operational leadership capabilities; (2) Establishing precision monitoring systems and data-driven information platforms through “Internet Plus” technologies; (3) Enhancing legislative frameworks and scientific risk assessment mechanisms to support complex crisis governance.