ESB Networks crews worked late into the night to restore power to homes and businesses in Limerick.
The power went out just after 7.00pm this evening following a fault in the Southill substation, affecting some 2,000 homes and businesses.
Locals said they heard a loud bang and a bright light before the electricity went out.
Some of the last areas to be restored were in Roxboro, Balllyneety, Rosbrien and parts of the Southside of the city.
Through their official twitter account ESB Networks have confirmed supply has been restored.