The emergency weather alert had come early Fourth of July morning: There would be life-threatening flash flooding in Kerr County, Texas. And Camp Mystic – an all-girls Christian camp situated along the Guadalupe River – housed about 750 campers on the flood-prone site as heavy rains started pouring.

Federal regulators repeatedly granted appeals to remove Camp Mystic’s buildings from their 100-year flood map, as the camp operated and expanded in a dangerous flood plain.

At least 19 of the cabins at Camp Mystic were located in designated flood zones, including some in an area deemed “extremely hazardous” by the county.

FEMA removed dozens of Camp Mystic buildings from its 100-year floodplain map for Kerr County, the AP reports.