There have been no chemical injuries so far after the fertiliser plant explosion in West, Texas, a doctor at the Hillcrest Hospital said.
A spokesman said at least 60 employees of the West Fertilizer Co were being treated at the hospital.
Victims in the hospital currently include those with skin injuries, bruised lungs, and impact injuries from the initial blast and from subsequent debris.
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.