Greece is still experiencing extreme torrential rains, with streets flooded and large debris being carried away in the water flow. Hundreds of millimeters of rain are being reported in just 10 hours.

Estofex: A level 2 was issued across parts of Greece for exceptionally heavy rainfall and to a lesser extent for tornadoes.

Original text:
Estofex has issued Level 1 and Level 2 warnings for parts of Greece, Bulgaria, and Turkey. You can read the full in-depth analysis on the Estofex website. The specific areas with warnings are visible in the image.

Source: Estofex.org

By far, the most serious situation appears to be in Greece, where up to hundreds of millimeters of rain could fall in the next few days, causing flash floods, landslides, and floating debris that could pose a serious danger to residents.

Sitauce is clearly visible on the Weather Radar(displayed), Rain, Thunder, Rain Accumulation layers. Don't forget to compare multiple models with each other (ECMWF, ICON, GFS, and the local ones.)

Rain, thunder layer with NEMS model

Rain accumulation (next 3 days) on the ICON-EU model

https://www.windy.com/-Weather-radar-radar?radar,39.514,22.267,10,internal