The catastrophic floods in Central Texas took a mental and physical toll on survivors and first responders. CBS News correspondent Jason Allen spoke to the program director for Texas Search and Rescue,

In Kerr County, the hardest-hit region, officials said the number of missing remained unchanged, at 161, since Tuesday. The floods have killed at least 121 people statewide.

Flash floods last week in Texas caused the Guadalupe River to rise dramatically, reaching three stories high in just two hours

Eight-year-old girls at sleep-away camp, families crammed into recreational vehicles, local residents traveling to or from work. These are some of the victims.

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.

This week in Texas, estimates put the number of people still missing from the Hill Country floods at 161, a daunting figure atop at least 120 deaths confirmed by authorities. But that missing person tally might not be as precise as it seems.