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

Spain is deploying 500 more soldiers to help battle wildfires that have ravaged parched woodlands during a prolonged heat wave, Prime Minister Pedro Sánchez said.

The key to preventing forest fires is creating a rural economy based on the use of forests. While this would generate much-needed employment in “la España vaciada” – “hollowed-out Spain”, the name given to the country’s depopulated rural areas – it also costs money. It is therefore essential to invest in forests.

Spain's worst wave of wildfires on record spread to the southern slopes of the Picos de Europa mountains on Monday and prompted authorities to close part of the popular Camino de Santiago pilgrimage route.

Spain deploys 500 additional soldiers to fight devastating wildfires as extreme heat fuels blazes across Europe.

Spanish PM Pedro Sanchez declares civil protection emergency as wildfires devastate Spain, killing four and displacing thousands

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.

Spain on Friday warned of "very high or extreme fire danger in most of the country," as firefighters there continue battling 14 blazes in temperatures up to 104 degrees Fahrenheit.

A second volunteer firefighter has died after battling a wildfire in the northern Spanish province of Leon, while police arrested a man for allegedly starting a separate blaze as the country faced one of its worst summers for fires in 20 years.