With more than 170 still missing, communities must reconcile how to pick up the pieces around a waterway that remains both a wellspring and a looming menace.

The Guadalupe River has a history of deadly flooding. Here is a look over the decades. (AP video Marshall Ritzel/Albee Zhang)

NPR has compiled a timeline of when local, state and federal officials posted warnings on social media as well as the timeline of events as presented by local officials.