Burkina Faso has a primarily tropical climate with two very distinct seasons. In the rainy season, the country receives between 600 and 900 mm (23.6 and 35.4 in) of rainfall; in the dry season, the harmattan – a hot dry wind from the Sahara – blows.
Burkina Faso is religiously diverse society with Islam being the dominant religion. According to recent census (2006) conducted by Government of Burkina Faso, 60.5% of the population adheres to Islam.
Burkina Faso has three main rivers — the Black Volta, the Red Volta and the White Volta. Areas near rivers are affected by tsetse flies and simulium flies.This list is arranged by drainage basin, with respective tributaries indented under each larger stream's name.