Intense rainfall floods Dhaka, Bangladesh, one of the world s fastest-growing megacities, year in and year out, and those in the city s slums and shanties are usually the most affected. Low-lying flood plains, rivers, and canals that once drained water are gradually filling up as a result of indiscriminate urbanization and now magnify rather than help solve the problem. The climate outlook for South Asia in the 21st century is heavier and more erratic rainfall during the monsoon season, according to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change and the World...