On Sunday, Greece's National Meteorological Service (EMY) issued a WEATHER RED ALERT alerting the public to impending very severe rains and storms. A "Red Alert" of the highest category is sent out to warn of hazardous and extreme weather occurrences.

From Monday, September 4, through Wednesday, September 6, 2023, the weather is expected to get worse. It's predicted that there will be significant downpours and storms, along with hail, frequent lighting, stronger gusts, and a considerable drop in temperature.

Most of the country is expected to be affected by a barometric low with chilly air masses moving south from the northern Balkans to the southern Ionian Sea.

The biggest amounts of rain will fall in Thessaly, Sporades, central and eastern Sterea, northern Evia, and the Peloponnese, according to EMY.