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.

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.

Experts suggested that more data and education are needed as Texas and the rest of the country build in known flood plains.

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.

The state has identified more than $50 billion in flood control needs. But lawmakers have devoted just $1.4 billion to address them.

A report released by the Texas Department of State Health Services shows that just two days before the deadly floods swept through, the camp inspectors signed off on Camp Mystic's emergency plan. Meanwhile,