Dhaka is one of the fastest growing mega-cities in the world. Nearly 36% of the urban population lives in the capital of Bangladesh. Nearly 17.4 million people are living in this city at present. The population is increasing approximately at 1.65% per year in Dhaka city. As a fastest growing mega-city in the world, Dhaka is attracting an estimated 300,000 to 400,000 mostly poor migrants a year. That's creating pressure on the ongoing poverty level in the city. Poverty affects a third of Dhaka's residents, mostly living in slums. The densely populated capital of Bangladesh continues to dominate the list of world cities with the worst air quality. Dhaka occupied the first position in the list. Besides natural causes, unplanned infrastructural development, inadequate and inefficient drainage are the main causes of floods and water logging in Dhaka city. Due to lack of planned growth in the city, chaotic urbanization has come up with many serious problems. Planned urbanization is quickly becoming a necessity though this may cause numerous challenges for the government.