July : Blast at Bayer AG plant kills one person , wounds another . Police extinguish fire about two hours after blast . People asked to stay indoors after explosion raised concerns about air quality . Sterling Lewis Jr. , West Virginia 's fire marshal , told reporters Friday morning that a helicopter took the injured person to a burn unit in Pittsburgh , Pennsylvania . Plant produces crop - protection chemicals .
July : Blast at Bayer AG plant kills one person , wounds another . Police extinguish fire about two hours after blast . People asked to stay indoors after explosion raised concerns about air quality . Plant produces crop - protection chemicals .