At least six people have been killed and more than 100 others injured after gale-force winds, rain and hailstorms lashed northern Greece late Wednesday.
Authorities said the victims included two Czech nationals, two Romanians and two Russians.
Television footage showed strong winds uprooting trees and collapsing roofs in the Halkidiki peninsula.
According to reports, some suffered head injuries from falling trees and other objects.
Prime Minister Kyriakos Mitsotakis is reportedly monitoring the situation while emergency services are being carried out.
Meteorologist Klearxos Marousakis described such severe weather conditions unusual for summers, which are typically hot and dry.

Shooting at Australia's Bondi Beach kills 12
Police hold person of interest after Brown University shooting leaves two dead
Hamas says Israel's killing of senior commander threatens ceasefire
Ukraine's Zelenskyy ditches NATO ambition ahead of peace talks
Thailand declares curfew along coast as Cambodia border fighting spreads
