The expansion of urbanization and the replacement of natural surfaces with artificial materials lead to temperature rise and the formation of the urban heat island (UHI) phenomenon, which results in consequences such as increased energy consumption, intensified air pollution, and threats to public health. This study aims to identify the factors influencing UHI and propose strategies to mitigate its impacts. The research was conducted using a systematic review and descriptive-analytical approach. To this end, relevant scientific articles and studies were examined, and the collected data were analyzed and categorized. The findings revealed that the key factors intensifying UHI include dense urban geometry, neglect of sustainable green facades and rooftops, improper and inefficient building mass design, use of materials with high thermal capacity and low albedo, reduced quality and efficiency of transportation infrastructure, loss of vegetation cover and surrounding natural ecosystems, shortage of water bodies, and ineffective natural ventilation in urban fabrics. The proposed strategies are divided into two scales. At the urban scale, optimizing urban design by regulating the height-to-width ratio of streets, creating wind corridors, and developing sustainable transportation infrastructure play a significant role in improving ventilation and reducing temperature. Expanding green and blue spaces through evapotranspiration processes and preserving natural ecosystems around cities help moderate environmental temperatures and improve air quality. At the building scale, the use of cool materials with high albedo, effective thermal insulation, green roofs and walls, and double-skin facades reduces heat transfer and enhances energy performance. Overall, the results indicate that integrating modern technologies, local strategies, and sustainable urban management can simultaneously reduce environmental temperatures, optimize energy consumption, and improve the quality of urban life.