SHAWANO, Wis. (AP) – Severe storms packing winds estimated at 90 to 100 mph damaged residential property, downed power lines and toppled trees, including one which fatally injured a motorist in Menominee County.  Emergency management officials say a woman was killed in Keshena Wednesday night when a tree fell on her vehicle.  Authorities say about a dozen homes in the Bonduel area of Shawano County sustained damage. A lightning strike caused a fire at a nursing home forcing the evacuation of approximately 13 residents. They were taken to a sister facility.   The National Weather Service says most of the damage in Shawano County was caused by straight-line winds.  More than 20,000 utility customers lost power in the storms. By Thursday, crews had restored service to all but about 1,000 customers.