A storm hit Athens on Thursday noon turning roads in the northern suburbs of the capital into rivers.
Traffic police closed main roads in Kifisia and Nea Erythrea as the torrents of water made driving conditions dangerous.
According to the fire brigade, they have received 140 calls for help and to pump out flood water from the two areas and in the suburbs of Vrilissia, Melissia and Penteli.
Most of the calls came from drivers trapped in vehicles in Marousi and Kifissia, while police said that some roads have closed in Kifissia and Nea Erithrea due to the floods, specifically the Erymanthou bridge in Kifissia and the Athens-Lamia national highway service road near the Vassilopoulos supermarket in Nea Erithrea.
In Marousi, dozens of cars in a parking lot were submerged under the water.
On Wednesday the Greek meteorological service issued an emergency warning, forecasting heavy rains and storms affecting parts of Greece, including the greater Athens area.