Five children are feared dead after high water in a storm swept away the car they were in Saturday in Houston.

Joshlyn Bennett, foreground, her sister, Leanna Caldwell, right, and an unidentified woman react during the search for five children feared dead after the car they were in was swept away by high water in Houston. The women are family friends of Kerda Harris who is the mother of two of the children.Joshlyn Bennett, foreground, her sister, Leanna Caldwell, right, and an unidentified woman react during the search for five children feared dead after the car they were in was swept away by high water in Houston. The women are family friends of Kerda Harris who is the mother of two of the children. (Melissa Phillip/Houston Chronicle/AP)

Travis Campbell, 24, watched in shock as police and firefighters searched for the bodies of his 7- and 10-year-old nephews.

"At this point, I just want their bodies to be found," he said.

Rescue workers found the car in a ditch at 7:30 p.m. about 30 metres from where the driver lost control two hours earlier, Houston assistant fire chief Omero Longoria told the Houston Chronicle.

Two men and a 10-year-old girl managed to escape, but rescuers couldn't get to the other children because the ditch was filled with nearly three metres of water.

There was at least one other death Saturday related to massive storms that swept across southeast Texas. A 76-year-old Fayette County man died after his car got stuck in a flooded underpass.

Nearly 127 millimetres of rain had fallen at Houston's Hobby Airport by 5 p.m. Saturday.