Tuesday's fires were scattered through at least three neighborhoods, including the city's east side. No injuries were immediately reported.
Wind gusts reported by the National Weather Service of up to 50 mph fanned the fires. Winds knocked out service to at least 124,000 Michigan utility customers.
DTE Energy Co. spokesman John Austerberry said Wednesday the utility was "looking into" possible links between its lines and the fires. About 15,000 DTE customers remained without power, mostly in Detroit, after 50,000 lost power the previous day.
CMS Energy Corp. spokeswoman Debra Dodd said about 9,800 remained blacked out after 74,000 customers lost power Tuesday.