Additive manufacturing has emerged as a strategically important technology for smart-city disaster management because it enables localized, on-demand, and highly customized production under time-sensitive conditions. Its relevance extends beyond emergency logistics: it intersects directly with resilient urban development through faster housing delivery, reduced material waste, decentralized production capacity, and improved continuity of critical infrastructure services. This article presents a structured synthesis of established 3D-printing applications in urban disaster contexts, with emphasis on technology selection, community readiness, and implementation priorities for municipal authorities. The analysis integrates four core domains repeatedly documented in the literature: desktop fabrication for rapid local response, precision fabrication for specialized medical and technical needs, durable part production for infrastructure restoration, and large-scale construction printing for shelter and housing delivery. It also examines the role of educational programs, makerspaces, and standards-based governance in converting isolated demonstrations into city-level resilience capacity. The synthesis highlights specific documented cases, including lower-cost medical supply production in Haiti, post-earthquake repair and water-system restoration in Kathmandu, communications support after Hurricane Maria in Puerto Rico, distributed personal protective equipment production during COVID-19, and accelerated housing construction in China, Italy, and Mexico. The evidence indicates that the most effective municipal strategy is neither purely technological nor purely institutional. Rather, resilient urban outcomes depend on combining accessible fabrication capacity, validated design protocols, community training, interoperable standards, and integration with broader smart-city systems. The article concludes with a practice-oriented implementation framework for municipalities seeking to align additive manufacturing with disaster preparedness, emergency response, infrastructure recovery, and sustainable urban development.