HOUSTON - A family of six drowned in a van Sunday afternoon while trying to escape the floods of Hurricane Harvey, relatives tell KHOU 11 News. It is thus far the single deadliest incident resulting from the storm.

The victims include four children (all 16 or younger) and their great-grandparents. The driver of the vehicle (the children's great-uncle) managed to escape before the van went under water.  He was rescued clinging to a tree.

The van was discovered by deputies with the Harris County Sheriff's Office late Wednesday morning.

All six were recovered inside of the vehicle.

Family members tell us the victims are Manuel Saldivar, 84, his wife Belia, 81, Daisy Saldivar, 6, Xavier Saldivar, 8, Dominic Saldivar, 14, Devy Saldivar, 16.