WATCH: Time-lapse video captures stunning Texas flood

A time-lapse video reveals how quickly the flash flood in Kerr County, Texas, on Friday developed.

Authorities say at least 82 people were killed in the catastrophe, and President Donald Trump issued a disaster declaration.

He said, “”These families are enduring an unimaginable tragedy, with many lives lost, and many still missing. The Trump Administration continues to work closely with State and Local Leaders. Secretary of Homeland Security Kristi Noem was on the ground yesterday with Governor Greg Abbott...