There were more than 13,000 power outages in the state on Thursday morning, but that number has been cut to 2,100.
Officials from Connecticut Light & Power said the problem was a couple of lines coming down at two substations.
The outages started around 8:15 a.m. and crews are working as quickly as possible to restore power.
At the height of the outage, there were almost 7,100 power outages in East Lyme, which was more than 19 percent of the town, but that number is down to around 300 customers.
There are also more than 1,000 outages in Essex.
CL&P does not have an estimated time for when power will be completely restored.