It has now affected five municipalities, with more than 300 troops involved in the firefighting.
As at 8am this morning, Gran Canaria Cabildo said the fire was “neither controlled or stabilised.”
Overnight, more families were ordered to leave their homes, bringing the total so far to 800 people.
Eleven aircraft are helping to fight the fire from above.
Many roads have been closed and school children in some areas told not to report for class this morning.
Efforts are being made to restore electricity cuts in the affected areas.
The blaze has already affected 2,000 hectares, having been fanned by strong wind and the dry conditions.
Rain is being forecast for this morning which might prove the saviour.
The fire is being called a “catastrophe” but no injuries have been reported.
A new inspection was being made at 8am this morning.
As yet, there is no indication as to what caused the fire which is away from the main tourist areas, having started near the summit.
However, the luxury Tejeda Parador hotel suffered damage to its grounds just inches from the bedrooms. It was evacuated before the flames advanced.
An urgent appeal was made to anyone who has a home in the area to leave immediately, particularly in the districts of Cruz, Lagunetas, Cueva Grande and Caleteras.
Two social centres have been made available in preparation for taking around 100 displaced families.
A level 2 emergency has been declared because of strong winds fanning the fire.
The Mayor of Tejeda has spoken of “an incredible fire” in the island’s summit.
One man on the island who witnessed the fire said: “The mountains are on fire, so sad to see.”