1300 People Lose Power in Springfield Monday Night
About 28 WMECO customers in Longmeadow were also without power around the same time.
WMECO Spokesperson Priscilla Ress told ABC40 that the outages were likely caused by transformer failures.
The equipment failure was possibly caused by a large number of people using air conditioning units, but WMECO is still looking into the cause.
All WMECO customers have had power restored back to their homes and businesses.