The Climate-Proof Planning towards the Ecological Transition: Isola Sacra—Fiumicino (Italy) between Flood Risk and Urban Development Prospectives

The increasing concentration of people and economic activities in urban areas intensifies the pressure on the urban environment and hastens environmental degradation processes. Therefore, addressing the impact of climate change on cities is an urgent matter that demands the immediate attention of policymakers, researchers, and the general public, not only for its environmental but also socioeconomic ramifications. Within this framework, the research focuses on the effects of climate change on coastal cities and aims to define guidelines for the innovation of urban planning tools from a climate-proof perspective. Specifically, the study analyses the effects of two phenomena related to climate change: heavy rainfall, river overflow, and sea-level rise, to establish a replicable approach for updating the documents that constitute the cognitive framework of the Local Urban Plan through the preparation of a multi-risk map (that considers different time horizons) and consequently the prescriptive apparatus of the Plan through the definition of a toolkit of site-specific design actions oriented towards urban adaptation. The proposed methodology is tested on the case study of Isola Sacra, Fiumicino (Italy), and is intended to apply to other territorial contexts. The aim of this study, in accordance with the principles of the Disaster Risk Reduction (DRR) framework, is to furnish theoretical-methodological and operational guidelines to translate risk knowledge, despite its limitations due to variables and uncertainties in measurements, into effective urban adaptation measures.