The utilities said crews would work around the clock to restore power.
The National Weather Service said Muskegon, Mich., was reported to have 9 inches of snow as of Wednesday morning. Authorities said weather might be a factor in crashes that killed motorists in Sanilac and Monroe counties.
In Wisconsin, more than 440 stranded vehicles and crashes were reported in Milwaukee, Sheboygan, Kenosha, Ozaukee and Washington counties after heavy snowfall that started Tuesday and continued into Wednesday. No major injuries were reported.
Rupnik said the main highways in Sheboygan County were drivable as of Wednesday afternoon, but he expected the secondary roads to remain a problem into Thursday.
Many parents in southeastern Wisconsin didn't have to take to the roads Wednesday, with several school districts canceling classes. That included the state's largest school district of Milwaukee, which received about 9 inches of snow. A 71-year-old man collapsed and died Wednesday afternoon shortly after snow blowing in Milwaukee.
On the plains in the eastern half of Colorado, wind and snow created white-out conditions Tuesday afternoon just as buses began taking students home from the Miami-Yoder district school about 40 miles east of Colorado Springs. The buses turned back to the school and about 60 students ranging from preschoolers to 12th graders watched movies, played basketball, ate concession-stand pizza and talked to their parents before bedtime.
The older kids slept on wrestling and gym mats covered with coats, while the younger ones curled up on preschool napping mats, Principal Sharon Webb said.
The school is a large version of a one-room schoolhouse. The students all know each other, and many are related, which Webb said gave it the feel of a sleepover. She said parents were understanding.
"When you live out here in this wide-open country, you know they're where it's the safest," she said of the school.