US regulators reportedly altered official maps of flooding risks to remove many of the buildings at a camp in Texas where 27 children died in severe floods.

Some camps in the region had to be evacuated, and local newspapers described how Camp Mystic was among those cut off from the outside world. According to a Kerr County history book, floodwaters at Camp Mystic almost reached the top of the dining hall’s stairs.

The July Fourth flood moved so quickly in the middle of the night that it caught many off guard in a county that lacked a warning system.