Emergency officials are starting to focus on alert systems as they search for answers about how the flash flooding swept away so many.

Flood watches have been issued by the National Weather Service until at least 7 p.m. CT July 6 in Hill Country and along the I-35 corridor. The Weather Prediction Center added that scattered thunderstorms are likely to drop "torrential downpours over sensitive soils across parts of the Texas Hill Country."

This isn't the first time flooding along the Guadalupe River has claimed lives. Jim Moore was a reporter who covered an eerily similar flood nearly four decades ago.