The return of tornadoes and torrential rains to Oklahoma has caused panic among residents still shell-shocked by the May 20 tornado and caused them to behave erratically, the mayor of Oklahoma City has said.
For reasons that are not clear to me, more people took to the roads, more than we expected. Everyone acted differently in this storm, and as a result, it created an extremely dangerous situation.
I think we are still a little shaken by what happened in Moore. We are still burying children and victims, so our emotions are still strong.
Brandi Vanalphen, 30, said she took extreme measures when she found herself among hundreds of drivers trapped on Oklahoman roads as they attempted to flee the latest threatening tornado system.
What got me scared was being stuck in traffic with sirens going off. I started seeing power flashes to the north, and I said 'screw this.' I started driving on the shoulder. People started driving over the grass.
More top news
A modified version of the herpes virus has proved a major success in phase III clinical trials.
The WWF reports that these new species were all found in 2014 - but that human development is already threatening many of them.
Research into long-term breeding patterns in flies showed that mothers whose ancestors displayed gay behaviour were more fertile.