Twenty-seven girls attending Camp Mystic in Kerr County are missing following intense flooding in Central Texas, officials said on Saturday.

The camp for girls has two sites less than a quarter mile apart near Hunt, Texas. The missing girls are believed to have been staying at the Guadalupe River site.

Several girls who are reported missing were in the low-lying cabins on the “Flats,” where junior and intermediate campers live, less than 500 feet from the river bank. Senior campers stay in the nine cabins farther from the river, in a section of the camp called “Senior Hill.”

About 750 girls were attending the camp this week, Lt. Gov. Dan Patrick of Texas said at a news conference Friday.

Camp Mystic has been run by the same family over generations since the 1930s, and some of its buildings have been standing since the 1920s. According to a camp brochure, its cabins are built out of native stone.

About five miles downstream where the two forks of the river converge, the water rose to at least 29 feet on Friday morning, the second-greatest height on record and the highest since the deadly 1987 flood. Flood stage begins at 10 feet.