A firefighting helicopter operates over a raging wildfire at the Kareas suburb, east of Athens, Greece July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Alkis Konstantinidis TPX IMAGES OF THE DAY

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. An elderly woman covers her nose and mouth as she walks away from a forest fire close to Saint George church in an Athens neighborhood, July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Yannis Behrakis 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A local resident sprays water to extinguish a forest fire in an Athens neighborhood July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Yannis Behrakis 

Tourists make their way next to the Parthenon temple as smoke from a raging wildfire rises in Athens, Greece July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Alkis Konstantinidis

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A Greek Orthodox priest covers his nose and mouth as he walks away from a forest fire close to Saint George church in an Athens neighborhood, July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Yannis Behrakis TPX IMAGES OF THE DAY 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A helicopter drops water over a forest fire as firefighters work to extinguish it in an Athens neighborhood, July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Yannis Behrakis 

Local residents try to extinguish a wildfire raging at the Kareas suburb, east of Athens, Greece July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Yiannis Kourtoglou 

A firefighting helicopter drops water on a raging wildfire at the Kareas suburb, east of Athens, Greece July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Alkis Konstantinidis TPX IMAGES OF THE DAY

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A firefighter extinguishes fire at a children's playground in an Athens neighborhood during a forest fire July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Yannis Behrakis 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. Local residents throw water to extinguish a forest fire in an Athens neighborhood July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Yannis Behrakis 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A local resident sprays water at a forest fire in an Athens neighborhood, July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Yannis Behrakis 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. Local residents carry water to extimguish a forest fire in an Athens neighborhood July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Yannis Behrakis 

Tourists visit the ancient Acropolis hill as smoke from a raging wildfire rises in Athens, Greece July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Alkis Konstantinidis 

A Greek national flag flutters atop the parliament building as smoke from a raging wildfire rises in Athens, Greece July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Alkis Konstantinidis 

Smoke rises as a wildfire rages at the Kareas suburb, east of Athens, Greece July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Alkis Konstantinidis 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A military man kicks a wooden structure of fire at a children's play ground in an Athens neighborhood during a forest fire, July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Yannis Behrakis 

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. A Greek Orthodox priest stands in a safe location away from a forest fire close to Saint George church (background) in an Athens neighborhood during a forest fire July 17, 2015. Dozens of Athens residents fled their homes on Friday as wildfires fanned by strong winds and high temperatures burned through woodland around the Greek capital, sending clouds of smoke billowing over the city. REUTERS/Yannis Behrakis