In your first instance though, the children were missing from the hurricane. They weren't children in shelters looking for families, all of those children were accounted for and resolved with family. My observation was the separation from caregivers because there was a much smaller number that were listed as last seen and heard from with their parents or one of their parents. I wonder how many caregivers were actually grandparents or other elder relatives that didn't evacuate. The way the circumstances were listed though, it gave the impression that the caregiver made it, or was the one who reported them as missing. The children who died are the victims that make me weep because they didn't have the choice to leave or stay.
In your first instance though, the children were missing from the hurricane.
My "first instance" [above] is a description of the evacuation of the Superdome. I was not there, I can only rely upon reports from people on the ground. I would have to attribute any separation of children from parents/caregivers to well-intentioned, but ill conceived, methods of those directing the evacuation, not to the evacuees, themselves. [I am not sure what you mean by "missing from the hurricane"].
In the segment of society of which we speak, it is quite common for responsible grandparents [almost always grandmothers] to become caregivers to their grandchildren whose mothers are drug addicted or otherwise unable to care for the children they produce. The pattern of reproduction in the relevant population can mean that a grandmother may be in her 30s or 40s ... not necessarily elderly by anyone's standard.
Statistically, the number of child fatalities from the Hurricane is small. The overwhelming proportion of identified victims is elderly and disproportionately white compared to the {67.3% black/26.6% white ratio}, and {11.7% aged 65+ years/26.7% under 18 years} statistics of the population of the city. Only 6.9% of the population was under the age of 5. These facts have been under- or non-reported by the MSM.
I am unaware of any legitimate lists of large numbers of missing children. Bodies are still being found on an intermittent, occasional basis ... all that I read about are elderly folks.
I weep for all of the victims of this destructive hurricane ... whether elderly, children, white, black, or other. It has been a heartbreaking thing to watch unfold.