United States Environment Protect Agency define the term heat island as a built up areas that are hotter than nearby rural areas.
One can also feel about 1 - 6 °C higher temperature of air as well as surface of city and suburbs, comparative to nearby rural areas.
Considering Indian cities, which are rapidly developing, to accept maximum opportunity for nation development.
However, the constrain of land availability is hampering the city planning, and haphazardly city is being developed by builders and municipal corporations.