By Michael Francis Gore, Charlie Devereux and Ana CanteroVILLANUEVA DE LA SIERRA, Spain (Reuters) -Spain battled 14 major fires driven by high winds and aggravated by heat on Friday as authorities warned of "unfavourable conditions" to tackle flames that have already killed seven people and burned an area the size of London.

Firefighters in Spain have been battling wildfires in the north-western province of Leon. Three people have died in Spain due to the blazes this summer. The country is among several European countries experiencing scorching temperatures this week that fuel wildfires and which scientists say human-induced climate change is intensifying.

Hundreds of firefighters battled to put out wildfires across southern Europe on Thursday, some of which are believed to have been set deliberately by arsonists and stoked by an extended heat wave gripping the region.

Wildfires intensified across southern Europe on Wednesday with a round-the-clock battle to protect the perimeter of Greece's third-largest city and at least three deaths reported in Spain, Turkey and Albania.

Wildfires intensified across southern Europe on Wednesday, with at least three deaths reported in Spain, Turkey and Albania.