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.

The data also highlights critical risks in other areas along the Guadalupe River in Kerr County, and nationwide as many Americans have a flood risk they are not aware of.

The Federal Emergency Management Agency FEMA failed to include multiple buildings on its flood risk map for Camp Mystic in Hunt, Texas, according to an analysis by NPR, PBS s FRONTLINE and data

The camp where 27 girls died successfully challenged initial risk designations by US regulators, according to reports.

There are questions over why oversight was eased at Mystic Camp as it expanded in a hazardous floodplain, the AP reported.

The deadly Texas floods have brought the state's approach to land approvals, especially in flood-prone areas, under more scrutiny.

Eight years ago, in the aftermath of yet another river flood in the Texas Hill Country, officials in Kerr County debated whether more needed to be done to build a warning system along the banks of the Guadalupe River.