Warri and Effurun as shown in the figure, are located on Latitudes 5o27’ N and 5o36’ N and Longitudes 5o40’ E and 5o48’ E. They sit on the bank of Warri River which joined Forcados, and Escravos Rivers through Jones Creek in the lower Niger Delta Region to the Atlantic Ocean.

Studies have shown this region to have moderate rainfall and humidity from May to October. Experience has shown it to have a short dry season from December to March, making construction activities to be at their peak during these months. The natural vegetation predominant in this region is a rain forest with swamp forest in some areas.

Warri is one of the oldest cities found within the lower Niger of Nigeria. The city is described as a low-lying plain that consists mainly of unconsolidated sediments of Quaternary age. The sediments are partly of marine and fluvial origin.

It is one of the oil hubs in Delta State with Udu and Uvwie kingdoms having been integrated into the larger cosmopolitan Warri. It originally, comprised three ethnic groups of Urhobo, Itsekiri, and Ijaw people.