So far, I have not seen effects on Capital Metro's Metrorail Red Line (Austin-Leander) . The storm may not have been bad enough to have affected rail service on Friday and Saturday, and they don't run Sundays.
This is the only storm related alert as of yet from Cap Metro:
With the heavy rains and winds that resulted from Hurricane Harvey, you can expect to encounter delays to our regular bus service in the coming days. Plan accordingly and schedule extra time into your trips.
Just buses. But Monday rail service bears watching, as Austin has taken more of a hit since then.