The data also highlights critical risks in other areas along the Guadalupe River in Kerr County, revealing more than twice as many Americans live in flood prone areas than FEMA's maps show.

Follow for live updates in the Texas flooding as the death toll rises to 120, as rescue operations start to shift to recovery phase

Kerr County had discussed buying such things as water gauges and sirens after previous flood disasters. But as with many rural Texas counties, cost was an issue.

At least 27 campers and counselors were killed at Camp Mystic during the devastating Texas floods. Some are still missing.

An inspection report dated July 2 indicates that state inspectors noted the camp had emergency plans "in case of a disaster" in place and that staff and volunteers were briefed on the plans during training sessions and volunteer briefings.

Kerr County repeatedly failed to secure a warning system, even as local officials remained aware of the risks and as billions of dollars were available for similar projects.