Two firefighting helicopters collided while tackling wildfires in Greece, according to the headline of this report, though the underlying article text supplied consists mainly of unrelated Daily Mail navigation links and headlines rather than a full account of the incident. The collision comes amid a broader wildfire crisis affecting southern Europe, with Greece and France both experiencing severe blazes this summer.

Specific details on the helicopter collision — such as casualties, the location, or the cause — are not available in the text provided. Related coverage referenced alongside the story indicates that "unprecedented" wildfires have been ravaging France, prompting holidaymakers to avoid campsites, while thousands of homes have been evacuated in Greece as authorities battle the fires.