As search efforts entered their fifth day in the devastating Central Texas floods, Gov. Greg Abbott vowed to find "every single missing person," stressing that the mission will not end until all victims are accounted for amid a death toll that has surpassed 100.

In the Austin area, 12 people are still missing and 16 are known to have perished after rain swept away homes along rivers and creeks.

Four days have passed since anyone was found alive in the aftermath of the floods in Kerr County, Texas, officials said Tuesday.