Deadly mega-fires bring new challenge to Europe

The European Union describes wildfires as "a serious and increasing threat" across the continent.
Most alarmingly, forest blazes are growing in intensity, especially in southern countries such as Greece, Spain, France, Italy and Portugal but also in Scandinavia.
Experts warn the continent needs to get ready for blazes that reach a massive new scale. These superfires, or mega-fires, are catastrophic events that kill and blacken broad areas and are hard to stop.
Here's a look at Europe's wildfire problem.
What's happening?
Between 2000 and 2017, 611 firefighters and civilians died in wildfires in European Union countries, with economic damage calculated at more than 54 billion euros ($60.5 billion).
Portugal suffers more than most, recording over 18,000 wildfires a year since 2007. Huge blazes in 2017 killed at least 106 people.
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