Global warming has resulted increase in the amount of atmospheric moisture at a rate of 7.5%/ 0C and that is visible through the increase in extreme events. Such quantification is easy to understand at a global scale; however, the processes are complicated for monsoon regions, specifically for South Asia. Literature claims that the extreme events of Central India has increased significantly; however such an analysis has also been criticized considering huge spatial heterogeneity in precipitation characteristics. The spatial variability of monsoon extremes in India has increased and this points to the role of local factors. Global warming resulted an increase sea surface temperature over Arabian Sea resulting surge of moisture to west coast with very heavy Rainfall in Mumbai. This further gets intensified due to the urban heat island and urban structures generating extra convection and eddies. The future extreme rainfall projections of Mumbai show significant increase and a high confidence in such an increase comes from urban impacts.