Watch: Timelapse shows how suddenly Texas flood waters rose

At least 81 people have been confirmed dead and another 41 are missing following flash floods in central Texas on Friday.

Most of the fatalities were in Kerr County, where a riverside Christian girls' camp was deluged, claiming the lives of a number of children and leaving others missing.

Footage from 4 July shows how the water level of the Llano River in Kingsland, Texas rapidly increased.