When too much rain falls for the ground to absorb, it runs downhill, pulled by gravity into streams, creeks and rivers.

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

(Reuters) -Founded by a University of Texas football coach, Camp Mystic where raging floodwaters swept away dozens of girls - killing several and leaving many others missing - was established along the banks of the Guadalupe River in central Texas hill country nearly a century ago "to provide young girls with a wholesome Christian atmosphere.

At least 81 people, including more than two dozen children, died in the torrential downpour. Dozens more were still missing three days later.