Power was restored to more than a thousand Belleville residents who went without power Sunday morning, according to the Ameren Illinois outage map.
The outages were not weather-related, according to an Ameren spokesman, though severe thunderstorms hit the area Saturday evening with strong winds, lightning and rain.
A transformer in the Belleville area malfunctioned, causing the outages, spokesman Tucker Kennedy said. Crews worked at the substation Sunday morning to restore power.
Crews switched power to another circuit to pick up the customers without service. Power was restored to most residents late Sunday morning. Only 160 residents were still without power as of 1 p.m.
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More than 2,000 outages were reported in the Farmington, Missouri area south of St. Louis. Dozens were also without power in St. Louis county, according to the outage map.
The National Weather Service predicted a slight chance of showers and thunderstorms on Sunday and Memorial Day.