About 500 Bluewater Power customers in central Sarnia and Brights Grove were without power during Friday night's thunderstorm.
Some had power restored within minutes while others were without power for a couple of hours.
Over 800 Hydro One customers in St Clair and Enniskillen townships were without power for a few hours beginning at around 9:15pm Friday night.
A tree had fallen on a power line during the storm.
All but 65 customers had power restored by 1:30am Saturday morning with the remainder having power restored by 6:30am.
