NIPSCO had restored power by late Saturday morning to all but about 600 of the 9,000 customers left in the dark when strong storms moved through the area Friday night.
Most of the remaining outages are in the Hammond area and are expected to fixed by the day's end, said NIPSCO Communications Manager Kathleen Szot.
A few problem sites will linger into Sunday, she said. Those involve customers with individual service line issues.
The outages impacted the Hammond police department and its radio center, both of which had their service restored by early Saturday after having to rely on generators, according to Lt. Rich Hoyda.
Friday's outages were the result of heavy winds damaging power lines and trees, Szot said. Saturday's rain was not causing further problems, she said.