The freak flood struck early on Wednesday the towns of Mandra, Nea Peramos and Megara, some 50 kilometres west of Athens.
Vietnam braced on Monday for fresh storms as the official death toll from last week's floods and landslides rose to 72.
Floods caused by a tropical depression in Vietnam killed 37 people, one of the highest death tolls recorded in the country from flooding, the disaster prevention agency said on Thursday.
Divers found Paul McClean's corpse in the mud of a lagoon in the coastal village of Panama, 360 kilometres east of the capital Colombo by road, a police spokesman said.
US President Donald Trump travels to Houston and Lake Charles, Louisiana on Saturday to meet victims of catastrophic storm Harvey, one of the worst natural disasters in US history ...
Tuesday's deluge in Mumbai - nearly a month's average rainfall in a single day - had halted train services and led to flight cancellations.
At least four endangered rhinos that were swept away by floods into India have been rescued and brought back to their home in south-central Nepal, wildlife officials said Wednesday.
Floods and landslides triggered by monsoon rains in Nepal's southern plains have killed at least 90 people and damaged more than 2,800 homes, the worst such calamity in nearly 10 years.