Finally, Urban Heat Island are caused by the heat released by human activity within the city. The operation of cars and day-to-day urban activity in a city create a large amount of heat. this excess heat is called “waste heat” and may be more of a factor in UHIs than scientists first thought. In fact many cities remain warn even on cloudy days due to waste heat being released. thus, due to the high concentration of cars and people, heat is constantly generated