The fire in Mati village, some 18 miles east of Athens, was by far the country’s worst since blazes devastated the southern Peloponnese peninsula in August 2007, killing dozens. Monday’s fire was one of several that broke out in the country amid a sweltering heat wave.
Mati is in the Rafina region which is popular with local tourists, particularly pensioners and children at holiday camps.
Government spokesman Dimitris Tzanakopoulos said in a televised statement early Tuesday that the death toll exceeded 20 while more than 88 adults and 16 children were injured.
Greece issued an urgent appeal for help to tackle fires which raged uncontrolled in several places across the country, destroying homes and disrupting major transport links. Greece said it needed air and land assets from its European Union partners.