This study is among the first to develop different prototypes of generative AI (GenAI) chatbots powered by GPT 4 to communicate hurricane preparedness information to diverse residents. Drawing from the Computers Are Social Actors (CASA) paradigm and the literature on disaster vulnerability and cultural tailoring, this study conducted a between-subjects experiment with 441 Black, Hispanic, and Caucasian residents of Florida. A computational analysis of chat logs (N = 7,848) shows that anthropomorphism and personalization are key communication topics in GenAI chatbot-user interactions. SEM results (N = 441) suggest that GenAI chatbots varying in tone formality and cultural tailoring significantly predict bot perceptions and, subsequently, hurricane preparedness outcomes. These results highlight the potential of using GenAI chatbots to improve diverse communities' disaster preparedness.

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