The fire broke out at around noon on Sunday in the town of Cualedro, according to the Galician Department of Rural Affairs.
Firefighters continued to battle the flames into Monday morning and is estimated to have affected 2,000 hectares of forest and could be the biggest forest fire in the region this year, according to the rural affairs department.
At least one unoccupied house has been destroyed and many other homes have been evacuated, according to Europa Press.
Flames engulf a bush in the forest fire in Cualedro. Photo: Pedro Armestre / AFP.
Seven fires were burning across the country on Sunday in total, with three in three in Galicia, one in Cantabria, one in Castile and Leon, one in Catalonia and one in Extremadura.
Spain has seen a series of intense wildfires this summer in a record heatwave. The country is highly prone to forest fires in the summer because of soaring temperatures, strong winds and dry vegetation.