Elon tweeted "Starship is
ready to launch". As Elon said it, it should be assigned no significance at all.
I'm waiting for
temporary flight restrictions to be posted. They only seem to pop up when there's a real chance of something happening. We've already had two notices to mariners that proved to be false alarms. The TFRs show up very close to the start of the launch window. I don't recall the timing for the first launch, but they may come out at pretty much the same time as the launch license. Both come from the FAA.
Right now, there are no space operations TFRs in effect for the Brownsville area (other than the one that covers Starbase itself).