Massive explosion at Texas dairy farm kills thousands of cattle and injures worker.

An explosion and fire at a dairy farm in Texas has left one person critically injured and killed an estimated 18,000 cattle. The cause of the fire is under investigation, but it is believed that machinery at the dairy farm might have ignited methane gas buildup. The Animal Welfare Institute says that if the death estimate is correct, the fire is the deadliest involving cattle since the agency began tracking barn fires in 2013.