There is a fiber cut somewhere between NYC and Chicago.
At the same time there is also a fiber cut between Ashburn, VA, and locations in South Carolina. The cut is somewhere in NC.
Copy and paste from Level3 notification system:
"* CASCADED EXTERNAL NOTES 29-Jun-2018 15:13:37 GMT From CASE: 14815828 - Event Field Operations dispatched to the estimated failure location and upon arrival was advised by local law enforcement there was a truck that struck a utility pole, which then fell across the street and struck another pole, which then tore down the aerial fiber lines. In addition to the fiber lines being down, live power lines are down as well. OSP will be dispatching a fiber repair and construction crew to the site; however, until the local utility company has completed their repairs and deemed the area safe, fiber repairs cannot begin.
* CASCADED EXTERNAL NOTES 29-Jun-2018 19:21:05 GMT From CASE: 14815828 - Event The OSP has contacted the personnel transporting the replacement fiber, and they advised they remain en route, and on schedule for their ETA of 20:15 GMT. The next update will be provided upon their arrival, or as new information becomes available.
It's possible that several underlying carriers who actually own the dark (such as Zayo) have had the unfortunate conjunction of two cuts in two places, severing a great deal of diversity at the same time.
Level3: http://downdetector.com/status/level3/map/
Verizon: http://downdetector.com/status/verizon/map/
Spectrum: http://downdetector.com/status/spectrum/map/
ATT: http://downdetector.com/status/att/map/
My tinfoil hat says this is a state sponsored cyberattack, but this will probably come down to a scrub fat-fingering a config somewhere.