Bangladesh is a low-lying, riverine country located in South Asia with a largely marshy jungle coastline of 600 kilometers (370 mi.) on the northern littoral of the Bay of Bengal. Formed by a deltaic plain at the confluence of the Ganges (Padma), Brahmaputra (Jamuna), and Meghna Rivers and their tributaries, Bangladesh's alluvial soil is highly fertile but vulnerable to flood and drought. Hills rise above the plain only in the Chittagong Hill Tracts in the far southeast and the Sylhet division in the northeast.
Climate: Straddling the Tropic of Cancer, Bangladesh has a subtropical monsoonal climate characterized by heavy seasonal rainfall, moderately warm temperatures, and high humidity. Natural calamities, such as floods, tropical cyclones, tornadoes, and tidal bores affect the country almost every year. Bangladesh also is affected by major cyclones--on average 16 times a decade.