The City of Memphis is located on the eastern bank of the Mississippi River in the southwest corner of the U.S. state of Tennessee. It is the regional hub for a tri-state area of Arkansas, Mississippi and Tennessee.
Shelby County is located over four natural aquifers, one of which is recognized as the "Memphis sand aquifer" or simply as the "Memphis aquifer." This particular water source is stated to contain more than 100 trillion gallons (380 km3) of water.
Memphis has a humid subtropical climate, with four distinct seasons. The summer months are persistently hot and humid due to moisture encroaching from the Gulf of Mexico.