CBS News analysis shows there were 22 warnings sent by the National Weather Service for Kerr County and the Kerrville area, but many residents say they didn't get alerts.

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

In Connecticut, state officials are urging people to sign up for emergency alerts, especially after last summer’s historic flooding in the Naugatuck valley. “We were successful in doing what we did, but it was scary because you didn’t know if that water was going to crash through the door or windows,” said Bob Kozey, Seymour.