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.
More top news
A motorist who boasted about clocking 142mph on a motorway shot through a red light and killed another driver the following night.
Holli Cheung said her son Jordan saved her life after she suffered two cardiac arrests while being struck down by a rare virus.
Scientists have finally cracked the mystery and found that cleaner dairies are the reason the holes are disappearing.