I'd probably guess they will head for SXSW.
Already, a friend of mine in the area has learned the hard way to turn off all outside circuit breakers before leaving, as he found a very dilapidated school bus parked outside his place, plugged into his water and electric. I wouldn't be surprised that nearby storm drains smell of black water for the next couple weeks as well.
I bumped my homeowner's insurance up, secured my computers (all have encryption that requires both a password and a USB flash drive, and I take the USB flash drive with me), round up my external hard disks and put those in a secure location... then leave for my rig, well away from Austin. Even in cold, rainy weather, it still is a nice time.