The families of some of the victims who died in devastating floods at Camp Mystic have sued the Texas Christian camp, accusing its owners of gross negligence and failing to protect children in their care.

Twenty-seven children and counsellors died after flash floods swept through central Texas over the 4 July holiday. The families of seven victims allege that the camp's owners knew about the flood risk but did not take steps to prevent and evacuate campers from danger.

The lawsuit, filed on Monday in state court in Austin, is seeking more than $1m in damages.

The suit comes after the camp announced it would partially reopen next year, drawing criticism from some of the victims' families.

"These young girls died because a for-profit camp put profit over safety," the lawsuit said.