WYTZ: Minot is what you're thinking of, possible?

https://en.wikipedia.org/wiki/Minot_train_derailment
"Because it was the middle of the night, there were few people at local radio stations, all operated by Clear Channel with mostly automated programming. No formal emergency warnings were issued for several hours while Minot officials located station managers at home. North Dakota's public radio network, Prairie Public Broadcasting, was notified and did broadcast warnings to citizens."

https://www.cnn.com/2002/US/01/18/minot.chemical.leak/

https://slate.com/news-and-politics/2007/01/the-whole-story-about-that-toxic-spill-and-the-clear-channel-monopoly.html
"Clear Channel says that the communication breakdown wasn’t its fault." so there you go!

Like that old song, "It Wasn't Me!" by Shaggy.

https://rbr.com/local-clear-channel-exec-cries-foul-on-minot-myth/
"Clear Channel has gotten a bad rap," he wrote. Hard to believe, (before he was laid off in the 100th round of cuts, usually at Christmas time.)

ASIDE, years ago, I asked this question on a different, long-gone board. The reply: If I turn the station off, I'll surely get 3-4 calls in the morning....I just leave it on."