Sudden flash floods in Texas have killed 104 people, with dozens still missing.

Relentless downpours caused the Guadalupe River to surge by 26 feet in just 45 minutes, engulfing entire neighborhoods and sweeping families from their homes in the dead of night.

Among the dead are 28 children, including summer campers.

Critics blame staffing shortages for delayed alerts, which came around 4 a.m., too late for many. Bodies were found in trees and bushes as rescue teams combed the area.

Former President Trump will visit Friday to survey damage and meet rescue teams.