The rivers etching the terrain are a beloved feature of the rapidly growing region. But last week’s flooding was an agonizing reminder of the dangers they pose.

When storms roll in, water rushes downhill fast, gaining speed and force as it moves — often with deadly results.

Camp Mystic, a Christian girls' camp, reported that they lost 27 campers and counselors in the devastating floods, with 11 still missing. Several of the victims were from the Houston area.