Crews working across the Canary Island of La Gomera said they were "finding it difficult to limit the spread of fire".
Wind and high temperatures has helped rekindle the flames in many areas, and forced the emergency services to retreat from the hills and mountains.
Officials in La Gomera said there was evidence that the fire was started deliberately. Ten towns and villages were evacuated across La Gomera, whilst residents and holiday makers had to flee eight towns across Tenerife.
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There will be blustery showers across northern parts overnight with showery rain and sleet across the south.
Rap mogul Marion 'Suge' Knight has been arrested on murder charges after a fatal hit-and-run incident in Los Angeles.
The Canadian used only ice hooks to scale the frozen cliffs, and says the walls were "unstable" and "unpredictable".