They're radio announcements from an alternate dimension that's 12 minutes ahead. I've had dreams from there. It's very similar to here but they're a tad head of the curve.
No, definitely not that dimension. One of my favorites is where Texas and most of Central U.S. is still inland sea (Gulf of Mexico goes up into Hudson bay). Oil & gas rigs as far as you can see and the freakin' sharks are huge! If anyone visits there, my guy is on Rig 12, ask for Jeremy. He is marine biologist exploring undersea cave nearby where 30 ft sharks mate and dwell.
Place your bets!