I happened to hear this live.    Heather Seaman, in for usual anchor Stuart McGinn, began her 6 am newscast sounding like she was about 3 feet away from a mic, echo'ing and far away in a room - distractingly distant. (It sounded like, say, a Zoom call when someone has a great-sounding USB mic or headset mic but the wrong input is selected and the laptop's terrible built-in mic was used. And that may have been exact the case especially if Seaman was broadcasting from home.)   

Moore's board op (I believe usual board op Nick Maiorano was out on vacation) made the wise call to then drop out of that newscast after less than a minute due to the audio problems, and Moore began his show a few minutes early, joking he didn't have the extra few minutes of prep time (but admitted they'd been prepping for hours, as is usual - I think they have the 5 am morning meeting - by that point).

(Not sure on this, but I believe Moore may have then thrown to traffic himself but it was just the sounder and no traffic segment.) But they then cut back to Moore to riff and re-introducing Seaman whose mic quality was normal. But when Seaman threw to traffic, that traffic segment didn't happen either so it was back to Moore and that's where you heard (and the show audio) had the "train wreck" comment. Things improved from there.