The last remaining medium wave in North Macedonia [810 kHz] has failed
at least since August 14, 2021. According to gossip from the region, the
cause in this case is external.

Accordingly, the transformer station of the broadcasting station Ovce 
Pole was damaged by bush fires. The repair or replacement of the 
destroyed system parts is solely in the hands of EVN Makedonija, the 
responsible network operator.
This would mean that the medium wave would be as good as empty during 
the day in Thessaloniki as well. The stations on 972 and 1368 kHz, which 
can still be heard quite well there, are two of the medium wave pirates 
who are practically permanently active in Greece and ignored by the 
authorities. (translated from radioeins.de via mediumwave.info)