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.

By Guillermo Martinez and Ana Cantero VILLARDEVÓS (Reuters) -Scorching heat hampered efforts to contain 20 major wildfires across Spain on Sunday, prompting the government to deploy an additional 500 troops from the military emergency unit to support firefighting operations.

A fourth person has died in the severe wildfires sweeping the north and west of Spain, authorities said on Monday. A firefighter was killed when the truck he was travelling in overturned in León province overnight.