The death toll from last week's Oklahoma tornado is now at 18.
The victims of Friday's storm included three veteran storm chasers. The Storm Prediction Center said the men were involved in tornado research.
Oklahoma Gov. Mary Fallin says the death toll could rise as emergency workers continue searching flooded areas for missing residents.
Among the dead were two children - a baby sucked out of the car with its mother and a 4-year-old boy who had sought shelter in a drainage ditch with family.