The Urban Heat Island (UHI) effect poses significant challenges to cities globally, exacerbating energy consumption, public health risks, and environmental degradation. Traditional mitigation strategies, while beneficial, often fall short in densely populated urban environments where UHI intensity is increasing. This chapter provides a comprehensive analysis of both traditional and innovative UHI mitigation approaches, emphasizing emerging technologies and integrated frameworks that enhance urban resilience. Key solutions explored include IoT-based temperature monitoring, AI-driven predictive cooling, advanced materials like phase-change and reflective nano coatings, and nature-based blue-green infrastructure. Through comparative analysis and case studies from cities such as Barcelona, Singapore, New York City, Copenhagen, Tokyo, and Seoul, the chapter highlights the effectiveness of adaptive, data-driven approaches in cooling urban spaces. Furthermore, the chapter discusses the importance of ongoing monitoring, community participation, and policy frameworks that foster public–private collaboration, ensuring the long-term success of UHI strategies. This synthesis of innovative methods and traditional practices provides actionable insights for creating resilient, sustainable urban environments in response to rising temperatures.