Against the backdrop of climate change and other multifactorial influences

urban flood disasters are becoming increasingly frequent. For megacities

constructing an urban flood control system solely from the perspective of combating disasters is unlikely to be fully effective and it is also uneconomical to raise urban flood control standards to the level required for extreme disasters. Therefore

improving urban flood resilience has become a critical direction for megacities in addressing extreme rainstorm and flood events. Based on the investigation of flood disasters and case studies from typical megacities

this paper explores the basic characteristics of flood disasters in megacities

focusing on the unique complexity of flood disaster prevention and control

the chain amplification effect of flood disasters

and the uncertainty of disasters under climate change. It identifies key deficiencies in the flood resilience of megacities

such as the lack of risk awareness

inadequate grassroots response systems

insufficient on-site emergency measures

and weak multidimensional resilience frameworks. The paper proposes basic strategies to enhance flood resilience

including strengthening prevention and risk avoidance

improving flood detection and early warning systems

implementing joint prevention and control measures

and leveraging technological empowerment. It further suggests specific pathways for resilience enhancement

including popularizing flood disaster risk education

constructing a comprehensive safety and emergency framework

enhancing three-dimensional collaborative perception

improving precise early warning and response systems

strengthening disaster chain interruption measures

and promoting intelligent flood response systems. The research provides a macroscopic analysis of strategies and pathways for improving the flood resilience of megacities in China and offers valuable reference for flood control and resilience enhancement efforts in such cities.