Nearly a decade ago, neighboring counties, Guadalupe and Comal, installed flood sirens. Nearby New Braunfels regularly tests its outdoor warning system, which is designed to alert residents to flash floods that are common in the area. But in Kerr County, officials admitted over the weekend that no such system exists.

U.S. Rep. Julie Johnson, D-Farmers Branch, said Monday she will demand a full investigation by the House Homeland Security Committee into “what went