Pockets of the Back Bay were still without power Wednesday evening, resulting from a transformer fire on Tuesday. Many venues in the Prudential Center used generators for electricity, but others were shut down. About 4,000 customers still remained without power Thursday evening, down from the 21,000 originally affected.

Christopher A. Maynor—The Tech

Pockets of the Back Bay were still without power Wednesday evening, resulting from a transformer fire on Tuesday. Many venues in the Prudential Center used generators for electricity, but others were shut down. About 4,000 customers still remained without power Thursday evening, down from the 21,000 originally affected. Christopher A. Maynor—The Tech