Air quality deteriorated across large parts of Spain over the past week as a result of the wildfires, data from the EU’s Copernicus climate monitoring agency showed. Smoke from the Iberian Peninsula fires reached France, the UK, and Scandinavia, it said.

This year is turning into one of the worst fire seasons in recent memory in Europe. Firefighters are struggling to contain out-of-control wildfires in western Spain and Portugal.

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