Explosion at Texas dairy farm kills 18K cows, 1 person injured
Blast occurred in holding area before milking at Southfork Dairy Farm in Dimmitt
Very few cows in holding area survived, some may need to be euthanized
Police received multiple calls about explosion and fire
Only one person, a woman, was trapped in the dairy building
Trapped individual rescued and airlifted to hospital for treatment
Other dairy employees were accounted for and safe
Texas State Fire Marshal's Office investigating cause of fire
Incident occurred on Monday evening
Castro County Sheriff's Office and local officials involved in response and investigation.