At least 13 people are confirmed to have died after severe rainstorms hit parts of Greece, Turkey and Bulgaria - with more bodies being discovered on Wednesday afternoon.
Hundreds of British tourists are said to be stranded at destinations following the storms which have led to cars being swept away and streets submerged by rainfall.
In Greece, a record rainfall caused at least two deaths near the central city of Volos and three people were reported missing. The fire department said one man was killed when a wall buckled and fell on him, and the body of a woman was discovered on Wednesday.
One stranded tourist said the centre of Greek destination Skiathos is “underwater” and described the situation as “horrendously scary”.
In Bulgaria, a storm caused floods on the country's southern Black Sea coast and on Wednesday the body of a missing tourist was recovered.
It comes as the World Meteorological Organisation said that the northern hemisphere experienced its hottest summer on record, fuelled by climate change.