That's how much time passed from when the National Weather Service sent out its first flash flood warning for part of Kerr County to when the first flooding reports came in from low-lying water crossings.

Kerr County 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.

Flooding has been at the top of Texans’ minds this week, but this is not the first time that the need for flood-related measures has come up among local officials.

Nearly a week after deadly floods struck Central Texas, search and rescue teams are continuing to probe debris for those still missing.

At a news conference on Sunday, Governor Greg Abbott said people in Texas were used to flash flood warnings, but there was no sense of how deadly this would be. "There's no expectation of a water wall of almost 30ft high," he added.

Jennifer Berry Hawes ProPublica is a nonprofit newsroom that investigates abuses of power. Sign up for Dispatches, a newsletter that spotlights wrongdoing around the country, to receive our stories in your inbox every week.