Gov. Greg Abbott vowed Tuesday to continue rescue efforts in the flood-ravaged Hill Country “until every missing person is accounted for”.

Officials in Texas are facing mounting questions about whether they did enough to get people out of harm’s way before a flash flood swept down the Guadalupe River and killed more than 100 people, including at least 27 children and counselors at an all-girls Christian camp.

When deadly floods swept through Texas, the National Weather Service issued a series of warnings that should have automatically triggered alerts to be sent to cellphones as the Guadalupe River began to rise.