"Aila storm cut off electricity for 59,725 consumers. [A total of] 5,028 households were disconnected in Mustasaari [Korsholm], 3,542 in Pori, 3,231 in Uusikaupunki, and 2,256 in Eurajoki," the association said.
According to the Ostrobothnia region's rescuers, a strong wind has broken several trees and damaged boats moored along the coast.
Seismologists warned on Tuesday of an approaching storm, showers and a wind of up to 35 meters per second (114.8 feet per second).
The storm is expected to cross Finland and hit Russia on Thursday.