Spanish firefighters are struggling to contain wildfires in various parts of the country amid a heat wave with temperatures exceeding 40ºC (104F).
The most severe damage has occurred in the northwestern province of Zamora, where more than 61,000 acres (25,000 hectares) have been consumed.
More than 500 firefighters are supported by planes and helicopters pouring water into the sparsely populated area.
Experts have linked the abnormally hot period for Europe to climate change.
During the week, thermometers have risen above 40ºC (104F) in many Spanish cities; temperatures are usually expected in August.
The lack of rain this year combined with gusts of wind have given the conditions for the fires.
Many areas of Western Europe have been facing excessively warm temperatures in recent days, which has exacerbated fears of climate change.
The current heat wave in Europe began almost a week ago in Spain, where temperatures reached 43ºC.
The fire that started in the Sierra de la Culebra in Zamora has forced the evacuation of at least 10 villages, although the drop in temperatures during Saturday night helped the efforts.
Nearly 20,000 hectares of land had been burned in the Sierra de la Culebra and the fire was “still active”, according to a tweet from the Generalitat de Castilla y León.
The widespread fire caused the Madrid high-speed train service in northwestern Spain, which was restored on Sunday morning, to be canceled on Saturday.
Military units of firefighters have been deployed in Zamora, Navarre in the north and Lleida in the northeast.
No lives have been reported, but the flames have reached the outskirts of some villages in both Zamora and central Navarre.
In other villages, residents watched in despair as the black feathers rose from the nearby hills.
In the center of Navarre, authorities have evacuated about 15 small villages as a precaution, as high temperatures are not expected to drop until Wednesday.
Farmers were also urged to stop using heavy machinery that could cause an unintentional fire.
Forest fires are also active in three points in the north-east of Catalonia: in Lleida, in Tarragona and in a natural park in El Garaf, in the south of Barcelona.