Mauritania is mostly covered with desert, with only its western regions around the coast of
Atlantic Ocean having some vegetation. There are some oasis in the desert regions. Since it is a desert, there are large shifting dunes forming temporary ranges. The average elevation is around above the mean sea level. The northern regions closer to the
Tropic of Cancer receive around of annual rainfall compared to the southern portions that receive around . The average temperature is , while during winter nights it may even reach . Due to the geography, the inhabitants historically, have been nomadic. In modern times, people have migrated to urban centres during the drought in the 1970s and the 1980s. There are a few sedentary cultivators, who are located only in the Southern regions of the country. Research has indicated that the Saharan movement has resulted in reduction of rains in the region from the 1960s, when it received close to of rainfall. From 1 September to 8 September 2020, torrential rains topping 100mm fell near the border with Mali, causing widespread damage, particularly in the
Bassiknou department. ==Demographics==