Mobility linked to daily travel has led to traffic problems such as congestion with a high concentration of vehicles noted in the city of Saint-Louis. This situation is accentuated by the socio-professional reconversion of rural households affected by the effects of climate change, such as the abandonment of agricultural land and the absence of pasture for livestock. As a result, they always converge on the city to benefit from the services it offers.
If we go back a little in the history of the city of Saint-Louis, we note that the years of drought led to a change of residence of most of the rural population, in particular a massive rural exodus which provoked an anarchic occupation of the low areas of the city without connecting to the city’s sewerage system. This situation is at the origin of the flooding of the peripheral districts of the city of Saint-Louis, which are located in the Sor suburb. As an example, in 2003, with the return of good rainfall, the Senegal River basin flooded. This resulted in the river overflowing into the flood-prone areas of the city. It is in this context that the breach of Saint-Louis was opened on the night of October 03 to 04 to save the city from rain floods with a width of 4m. and today, it extends over more than 7km causing huge human losses and negative consequences on the economic activities of the population of Saint-Louis.
Finally, to talk about human mobility linked to climate factors, we will refer to this important part (youth) of the population that no longer has any hope in this country because most of them have lost their activities or have been hit by unemployment linked to the lack of policies to support young people and the weakness of their resilience to the effects of climate change. For this reason, they leave for the western countries, hoping to find a better future and to improve their living conditions as well as their families.