Nope, the warning system wasn't installed because the citizens of the community thought it was too expensive
During a news conference early Friday morning, Kerr County Judge Rob Kelly said he didn't know why the camps hadn't been evacuated, but that the county did not have an early warning system or outdoor sirens to alert people to flooding conditions.
“We’ve looked into it before … The public reeled at the cost,” Kelly said.
Yeah nah that's stupid