As questions swirl surrounding the timeline of who was notified about the flooding when, and if more could have been done, Department of Homeland Security Secretary Kristi Noem said an alert from the National Weather Service was sent to people in the flood zone -- but she said that doesn’t mean that people heard it.

Texas Gov. Greg Abbott says more than 160 people are believed to be still missing days after the flash floods that killed more than 100 people across central Texas. (The Associated Press)