Good idea - especially batteries for a portable radio & top of the gas tank cuz everyone & their dawg will be getting gas & prices are sure to go up, too.
The worse case would be the power going off due to high winds and/or tornadoes. Also, could be some heavy rains so the roads might be closed.
Due to hit the coastline around Saturday at 2 AM. So if it follows the computer models - it could brush near Austin later Saturday maybe early evening.
My Father lives west of Austin.
I agree on the batteries and gas. Prayers for all along the Texas coast. May God have mercy.