At least 161 people remain missing in Kerr County, Texas, as authorities and volunteers search the Guadalupe River for victims.

Over just two hours, the Guadalupe River at Comfort, Texas, rose from hip-height to three stories tall, sending water weighing as much as the Empire State building downstream roughly every minute it remained at its crest. The force of floodwater is often more powerful and surprising than people imagine.

Key questions remain unanswered about the actions Texas officials took both before and during the catastrophic July Fourth holiday floods remain unanswered

The state was hit with heavy rain last week, creating rapid floods that swept the Texas Hill Country by July 4, overflowing the Guadalupe River into Kerr County and other nearby areas. Camp Mystic, a Christian girls summer camp,