Two people have been killed, including a firefighter, as uncontrolled wildfires spread across Greece, a further 20 people have been injured, BBC reports.
Huge clouds of smoke are billowing over the northern outskirts of the capital, Athens, where people are being urged to leave their homes.
Thousands of people have been ordered to leave their homes outside Athens as the blaze tore through houses, cars and businesses.
More than 150 fires have been reported. Six areas have been put on high alert.
Greece, like many parts of Europe, has been grappling with extreme weather. The prime minister says a heatwave has turned the country into a powder keg.
Hundreds of firefighters are trying to control the fires with nearly 20 water-bombing aircraft. Extra firefighters and planes are being sent in from countries including France and the US.
Fires are also raging on the nearby island of Evia, and areas close to ancient Olympia, the birthplace of the Olympic Games.
Hundreds of residents and tourists on Evia have been evacuated aboard ferries and fishing boats, as wildfires closed in on its shores.
Greek Prime Minister Kyriakos Mitsotakis says the fires show "the reality of climate change". Temperatures in the country have been above 40C (107 degrees Fahrenheit) all week.
