Spain has sent 500 more troops to fight raging wildfires, bringing the total deployed to 1,900, as the death toll from the blazes has risen to four. On Sunday, a firefighter died after an accident during firefighting efforts when his truck fell down a steep hill,

Europe has been warming twice as fast as the global average since the 1980s, making the region more vulnerable to wildfires.

Two firefighters were killed on Sunday — one in each country, both in road accidents — taking the death toll to two in Portugal and four in Spain.