It’s not emergency, but i would consider an airport to qualify. The airport on Orcas Island, WA had harmonics issues from someone running an illicit FM transmitter in 2018.
More recently, a construction permit on 107.9 was cancelled after it was determined that it could not co-exist with an airport. (If I find the link, I'll edit this reply and post it)
John Tune airport should complain. Interference with air traffic is one of the highest enforcement priorities with the FCC. They'd probably show up as fast as they could drive there.
More recently, a construction permit on 107.9 was cancelled after it was determined that it could not co-exist with an airport. (If I find the link, I'll edit this reply and post it)