Description and objectives

ReACT addresses the assessment and mitigation of single and multiple risks in metropolitan and urban built environments (MUBE), considering the interaction between physical elements and users through a holistic approach to the definition, simulation, and analysis of both single and combined scenarios—whether slow-onset disasters (such as heatwaves) or sudden-onset disasters (such as earthquakes, even of low intensity, and floods).

ReACT aims to:

1. Systematize a spatio-temporal approach to single and multi-risk assessment by incorporating inclusive human-factor dynamics in terms of exposure (how many users), vulnerability (with which characteristics), and behavior (how people respond);
2. Enhance knowledge on scenario modeling, including non-critical ones, through storyline and what-if approaches that also consider the impact of secondary elements within the MUBE;
3. Adapt and extend existing rapid assessment methods and behavioral simulation tools, integrating these human and environmental factors;
4. Define multi-criteria evaluation frameworks for single and multiple risks, focusing on the scale of outdoor public spaces and their aggregation, to support decision-makers in pre- and post-retrofit analysis of the MUBE;
5. Support communication, engagement, and training of stakeholders and citizens through Virtual Reality (VR) and Augmented Reality (AR) tools.