In neighbouring Portugal, where fires are also blazing, another firefighter was killed on Sunday in a "tragic" traffic accident, President Marcelo Rebelo de Sousa said. Fires have also broken out in Greece, France, Turkey and the Balkans as a heatwave has scorched swathes of southern Europe.

Thousands of firefighters backed by the military and water-bombing aircraft on Monday battled dozens of wildfires across Spain and Portugal, as the death toll increased to six since the outbreaks began.

Southern Europe is experiencing one of its worst wildfire seasons in 20 years, with Spain among the hardest-hit countries. In the past week alone, fires there have claimed three lives and burned more than 115,000 hectares, while neighbouring Portugal also battles widespread blazes.