"All Austin public schools will be closed early Friday in anticipation of heavy vehicle traffic on major roads from Hurricane Ike evacuees."
(snip schedule of which schools close when)
“This is a precautionary step to remove students and buses from the roadways as early as possible. We are expecting a great deal of traffic from evacuees on local roads and highways. The safety of students is our first consideration.” Superintendent Pat Forgione said in a written statement."
The article goes on to list a number of other school districts that are closing early.