MADRID — Hundreds of firefighters were struggling on Tuesday to bring under control a forest fire on one of the Canary Islands, a Spanish archipelago off the northwestern coast of Africa, as the blaze forced the evacuation of about 9,000 people.

Luis Planas, Spain’s agriculture minister, said the fire was the country’s worst this year.

The blaze, which started on Saturday, has destroyed nearly 25,000 acres on the island of Gran Canaria, the second most populated of the Canary archipelago, with about 850,000 residents. The archipelago is one of Spain’s main tourist destinations, particularly during the European winter because of the islands’ mild climate.

The land engulfed by the fire includes part of Tamadaba National Park, which is home to several types of indigenous trees and plants.

Mr. Planas said on Tuesday that additional resources were being deployed to help contain the blaze, including drones, helicopters and an additional firefighting aircraft.