India, Aug. 2 -- Two firefighting helicopters collided while battling a wildfire in the Psatha area west of Greece's capital, Athens, on Sunday, with the fire department saying that a rescue operation has been launched to locate the crew.

"Search and rescue teams were immediately mobilised to locate and assist the crews," the fire service said.

Greece on Sunday faced multiple fronts and a growing toll of damage, with wildfires believed to have devastated swathes of forest and agricultural land, and the prime minister warned of "extremely difficult" days ahead.

Prime Minister Kyriakos Mitsotakis said Greece was experiencing "extreme weather conditions" with winds reaching 100 kilometres (60 miles) an hour.

"When the winds blow with suc...