Elissa Robinson

Detroit Free Press

Days after the largest power outage to ever hit Michigan, utility crews continue to work to restore electricity.

As of 11 a.m. Saturday, the state's two largest utilities, DTE Energy and Consumers Energy, report a combined 277,000 customers without power statewide.

But bitterly cold air is moving into the state, and some residents may not see their power back on until Sunday.

►Utility crews:We don't play favorites in restoring power

DTE Chairman and CEO Gerry Anderson and Gov. Rick Snyder visited a hard-hit area of Dearborn Heights on Friday to assess the damage caused by winds in excess of 60 m.p.h.

“We’re making good progress,” Anderson said at a news conference outside a Dearborn home where a pine tree was felled and a power pole snapped during the storm, causing outages in the neighborhood near West Outer Drive and Ann Arbor Trail.

About 800,000 DTE customers lost power Wednesday when high winds blew through the state. Of those, 231,000 customers were without electricity Saturday morning. DTE expects to have roughly 90 percent of customers restored by Sunday evening.

Of the 346,000 affected Consumers Energy customers, 46,000 remained without electric service Saturday morning.

Anderson said DTE has worked with 40 warming centers in southeast Michigan — a list of them is available at DTE’s website — along with faith-based and senior-services agencies to help people who need help staying warm.

Snyder urged residents to look out for vulnerable people, including the elderly, to make sure they can get through the cold temperatures on tap for the next few days.

Matt Helms contributed to this report.