Emergency services have been deployed around the village of Bédar where 12 people have been killed - among them four Britons, according to Spanish authorities. Another 23 people are still missing.
Local officials in the Los Gallardos area of Almería have warned the number of dead could rise, with fears that more Britons are among those killed.
A sustained heatwave with temperatures of around 40C (104F) has caused wildfires across Southern Europe this summer, particularly in France, Portugal and Spain.