Chloe Childress, a counselor at Camp Mystic, died during the flooding in Hunt, Texas, according to a representative of her high school.

On its website Monday morning, the all-girls camp said “our hearts are broken alongside our families that are enduring this unimaginable tragedy.”

Sally Sample Graves was a grandmother who was killed in the flooding, the BBC reported. Sarah Sample wrote that a massive wave destroyed her grandmother’s home. Sarah Sample’s father and his dog were also in the home at the time but both survived.