Firefighters in Spain, Portugal and Greece battled ongoing wildfires Friday, an important religious holiday in all three countries, as persistent hot, dry conditions challenged efforts to contain the blazes.

Authorities warned of "unfavourable conditions" to tackle flames that have already killed seven people and burned an area the size of London.

Thousands of firefighters in Spain and Portugal battled several wildfires Thursday ahead of an expected rise in temperatures that could worsen the situation on the Iberian Peninsula. In central Spain,