The blaze, happening north of the town of Niebla, halfway between Seville and the Portuguese border, was active in an area of around 4,000 hectares (9,900 acres), an adviser to Andalusia's emergency service, Antonio Sanz, said.
"This wildfire is driven by constantly changing winds, which up-ends attack strategies," he told reporters.
He adding that a "window of opportunity" had opened Saturday for a few hours, before conditions again worsened later in the day.
Sixty troops belonging to a military unit for emergencies were among the 275 firefighters, who were being assisted by some 20 aircraft and heavy machinery, the regional fire service said.
Firefighters battle a wildfire in Los Gallardos, Almeria, Spain on July 9, 2026. Photo by AFP
