Urban Heat Island is a growing concern for India, a developing country, with the 2nd highest population in the world. Sustainable growth has become a prime mover while planning cities and government policies. Environment concerns are being neglected due to a lack of scientific evidence supporting the environmental concerns. This paper aims to provide a summary of the research carried out in different cities to determine the formation of the urban heat island effect. The paper reviews the different aspects involved in estimating the urban heat island effect. The case studies have been grouped into the two main approaches used to obtain the data-Mobile Observations and Remote Sensing Observations..