This thesis explores the impact of urban transformation on the Urban Heat Island (UHI) effect in Travis County, Texas, over a decade from 2013 to 2023. Utilizing Landsat 8 satellite imagery, the study focuses on the correlation between Land Use Land Cover (LULC) changes and Land Surface Temperature (LST). The analysis reveals significant expansion of built-up areas, primarily at the expense of soil cover, leading to a substantial increase in surface temperatures. Vegetation cover, though decreased, plays a crucial role in mitigating temperature rises. The findings emphasize the need for strategic urban planning to balance development with environmental sustainability, particularly in rapidly urbanizing regions like Travis County.