President Bush declared the state a major disaster area as heavy rain continued to fall.
It is the wettest year on record in Austin, with more than 30 inches of rain since January, and Dallas-Fort Worth, Waco and Wichita Falls have received near-record amounts.
Thousands of residents have been forced from their homes by flooding. About 100 people in two subdivisions near Marble Falls were stranded for a third day as water blocked entries and exits, Burnet County Judge Donna Klaeger said. The state Department of Transportation was working on a way to get them out.