Spain's weather agency warned the public on Monday to be "cautious" of the "very high or extreme fire danger."

France sent two teams of 100 firefighters, who were “currently arriving,” Virginia Barcones Sanz, the director general of civil protection and emergencies in Spain, told reporters on Monday. Germany is deploying a team of 66 firefighters with 21 vehicles, while Finland is sending 30 firefighters, she said.

Thousands of firefighters backed by soldiers and water-bombing aircraft on Monday battled over 20 major wildfires raging across western Spain, where officials say a record area of land has already been burnt.