Six holidaymakers, including two children, died and at least 100 other people were hurt when a violent storm ripped across northern Greece.
Torrential rain, hail and gale-force winds battered an area around Halkidiki, close to the city of Thessaloniki, late on Wednesday.
A state of emergency has been declared and around 100 rescue workers deployed to help with the aftermath, Mirror Online reported.
A weather warning remains in place for the area, which is popular with tourists.
The extreme weather followed days of very high temperatures with the mercury soaring to 37C.
Charalambos Steriadis, head of civil protection in northern Greece, said the storm was an "unprecedented phenomenon".
Social media posts show cars blown over and buildings badly damaged.
Athansios Kaltsas, director of the Nea Moudania Medical Centre which treated many of the injured, said: "It is the first time in my 25-year career that I have lived through something like this."
"It was so abrupt, so sudden," he told the BBC.
A witness quoted by broadcaster ERT said the freak storm had lasted only for about 20 minutes.
Two Czech tourists were killed when their caravan was blown over.
Two Russians died, a 39-year-old man and two-year-old boy, when they were hit by a falling tree, while two Romanians, including an eight-year-old boy, were also killed when a restaurant roof collapsed.
