Homes in the Orange Valley area, Prospect, and part of Middle Road were all hit.

Last night Bermuda Electric Light Co. workers were trying to identify the cause of the blackout, which started just after 8 p.m.

Dozens of callers besieged the Belco headquarters last night. A duty operator at the firm said: "We've had a lot of calls. A troubleshooter is out looking for the fault.''