Spain and Portugal on Sunday braced for a fresh heatwave set to sweep the Iberian peninsula, with Lisbon warning of a very high risk of wildfires.

Firefighters gained control over some of the dozens of wildfires scorching Portugal on Wednesday, as fears mounted that weather conditions could further fan the flames.

EL ARENAL, Spain/AROUCA, Portugal (Reuters) -Thousands of firefighters struggled to put out a dozen wildfires raging in northern Portugal and central Spain through the night and into Wednesday, in the largest wave of blazes in the Iberian Peninsula so far this year after weeks of summer heat.