The chemical plant where a large explosion took place lies on the north-eastern edge of West in central Texas.
The plant is a short distance from a nursing home and a secondary school. There are also around 100 houses and a hospital within a 500-metre radius of the plant.
A major rescue effort is ongoing in a Texas town devastated by a fertiliser plant explosion that has been likened to a nuclear bomb blast.
A huge explosion at a fertiliser plant in the Texan town of West has injured more than 160 people and caused widespread destruction.