I live in Austin, and have been watching this story evolve on the news each evening.
Pretty scary stuff. My wife's worst nightmare, so she's freaked watching it.
Here's a story from last night about the 911 call someone made, video with it. http://www.kxan.com/Global/story.asp?S=3062050&nav=0s3cXMRU
Original story: http://www.kxan.com/Global/story.asp?S=3044294&nav=0s3dXCt3
Follow up the next day: http://www.kxan.com/Global/story.asp?S=3049360&nav=0s3dXFQQ
All these have a free video link.
Today they were supposed to release the 911 call the guy himself made, after he went through the flood gate, got carried downstream, and managed to make his way to someone's apartment for help.
The force of the water as he was being sucked through the flood gate ripped his clothes off...