Most residents had power restored by midnight but the situation remained unstable. President Gabriel Boric blamed power companies for not acting faster.

A large power outage struck most of Chile on Tuesday, resulting in a curfew until Wednesday morning for the areas hit by the blackout.

Chile's state miner Codelco (COBRE.UL), the world's largest copper producer, said on Wednesday it was evaluating the impacts of a nationwide powercut on its production, and that recovery would be its main focus.