urbanization has significantly altered natural ecosystems, particularly impacting waterbodies like streams and creeks. in thunder bay, ontario, the urbanization of mcvicar creek has led to increased impermeable surfaces and reduced riparian shading, resulting in changes to stream characteristics and water temperature dynamics. this thesis investigates the adverse effects of urbanization on mcvicar creek, with a focus on water temperature variations as a key indicator. through the collection and analysis of water temperature data from urban and non-urban study sites, this research aims to assess the impact of urbanization on stream thermal regimes. results indicate elevated water temperatures in urbanized segments of mcvicar creek compared to rural areas, suggesting the influence of an urban heat island within the city of thunder bay. additionally, the study reveals significant differences in stream depth and width between urban and non-urban sites, highlighting the morphological alterations induced by urbanization. these findings underscore the importance of stream restoration projects and long- term monitoring to mitigate the adverse effects of urbanization on stream ecosystems. by understanding the impacts of urbanization on waterbodies, policymakers and environmental managers can develop effective strategies to protect and rehabilitate urban streams, ensuring the health and sustainability of aquatic ecosystems in urban environments.