Utilities say crews worked through the night to restore electricity to thousands of Michigan homes and businesses without power following this week's severe thunderstorms.

DTE Energy says Friday that about 75,000 of its customers were without power.

The majority of the power outages are in:

· Oakland County – 39,000

· Wayne County - 22,000

· Washtenaw County – 4,000

· Macomb County - 500

Most of those without electricity lost service after storms late Wednesday and Thursday.

DTE Energy says its crews are working 16-hour shifts and extra help has been brought up from Ohio.

At its peak, the outages affected about 325,000 DTE Energy customers and 104,000 Consumers Energy customers.

Watch: DTE crews work hard to restore power across Metro Detroit

Watch: Thousands without power in Oakland County

COMPLETE FORECAST:JustWeather.com

DTE offers an interactive power outage map at its website DTEEnergy.com/map/outage.

DTE Energy offers the following suggestions for coping with a power outage: 

• Stay away from downed power lines and anything with which they come in contact, especially metal fences. Treat every downed power line as if it were energized.
• Don’t open refrigerators or freezers more often than absolutely necessary. A closed refrigerator will stay cold for 12 hours. Kept closed, a well-filled freezer will preserve food for two days.
• Turn off or unplug all appliances to prevent an electrical overload when power is restored. Leave on one light switch to indicate when power is restored.
• Always operate generators outdoors to avoid dangerous buildup of toxic fumes.
• If a customer is elderly or has a medical condition that would be adversely impacted by a power outage, they should try to make alternative accommodations with family or friends.
• During low-voltage conditions – when lights are dim and television pictures are smaller
• shut off motor-driven appliances such as refrigerators to prevent overheating and possible damage. Sensitive electronic devices also should be unplugged.
• Stay out of flooded or damp basements or other areas if water is in contact with outlets or any electrically-operated appliance. The water or moisture may serve as a conductor of electricity.  This can cause serious or even fatal injury.