Urgent measures include works on the Illisos River, initially a tributary of Kifissos, to increase drainage capacity in case of flood.
Rain and flooding hit the areas of Faliraki and Kalythia, and then spread to southern Rhodes and the city of Rhodes.
Parnitha Avenue remained closed beyond the casino area, while Karamanlis Avenue, also experienced heavy rainfall.
The judge cited officials’ negligence in the disaster that claimed 25 lives
Attica Region authorities say maintenance of Kifissos River is part of a flood prevention plan for the wider Athens area.
The European Commission is taking Greece to court for failure to update its flood risk management plans despite last year’s destruction.