Greek military forces were called in to assist the rescue efforts. At least four people in Greece and at least nine in neighboring Turkey have died this week amid torrential rains and flooding.
The floodwaters ravaged bridges, stranded tourists and swept away cars and buildings. Thousands of households were still cut off from power on Wednesday.
Firefighters are battling blazes near Athens and in a region where about 180,000 acres have burned, according to an E.U. official who called it a record.