(WSMV) The search for a 6-year-old boy swept away by flood water Thursday afternoon is expected to resume Friday morning.

Tristen Demumbran was riding in a van with his mother and siblings when they encountered high water near Sulphur Creek Road and East Beaverdam Road.

"They thought it wasn't as high as it was. They tried to go through to get something to eat," said Renee Swanson, the child's aunt.

Swanson says the water came up and slammed the vehicle into some trees.

The boy's mother, Gidget Demumbran; grandmother Tammy Breshear; and 14-year-old sister got out, but Tristen and two other boys were stuck inside.

"Mom got a hold of the two youngest boys. The water took her under and the two boys. She got hit by a tree or some debris and knocked her out," Swanson said.

During all that, Swanson says, Gidget Demumbran let go of the two children - one of them 6-year-old Tristen.

"She was unconscious for quite a while. She came to, the grandmother was able to get the next to the youngest out," Swanson said.

Swanson says they found Tristen's brother in a nearby field.

But with no phone, it was some time before the mother could call for help.

All the while, Tristen was missing. And as day turned to night, there was still no sign of the young boy.

"All we can do is wait and leave it in the Lord's hands," Swanson said.

Emergency management officials say they plan to return to the area and resume searching at 8 a.m. Friday.