I would think KOKC would file a complaint, the FCC would verify and send a letter to KYND ordering a response to the complaint. KYND would be subject to a fine. If the problem is not resolved I suspect KOKC could take the case to court, but the first step is for them to file a complaint with the FCC. Naturally if they went to court they'd need to prove damages and just saying a loss of listeners won't get it.
I recall immediately following Hurricane Harvey the ground was so saturated with more rain than had fallen at one time since likely before there was a thing called radio stations, KYND at legal power and properly tuned directional was mingling with KOKC in Oklahoma City proper. I heard it over the phone. I agreed to go to critical hours power all day for a couple of weeks which was enough to resolve the issue. Once the moisture evaporated things were fine. Areas of Houston got up to 50 inches of rain from Harvey and I think the tower site got about 36 inches. They didn't seem to believe me until I suggested I'd welcome the FCC to come take a look but preferred we try to resolve the issue ourselves.