Rivers of lava have destroyed at least 166 buildings and more than 100 hectares of land on the island of La Palma.
Dozens of homes and at least one school have been destroyed by three lava flows from the mouth of the Cumbre Vieja volcano. At least 103 hectares of farmland were also destroyed.
Further destruction is expected as the lava moves slower than expected towards the sea.
Twenty schools in the affected volcano La Palma have been suspended until further notice and other facilities are in danger.
Schools include educational centers in El Paso, Los Llanos de Aridane and Tazacorte.
The lava also destroyed the Los Campitos school, which has 23 students, and threatens the Todoque school, which has 25 places.
Although lava was expected to reach the coast on the evening of September 20, it has yet to do so and scientists warn it could occur today.
When this happens, explosions and toxic gases are expected to engulf the area. However, acid rain seems less likely now, experts said.
The Spanish Merchant Navy has temporarily banned shipping in areas near the volcanic eruption of La Palma.