Homes and businesses were destroyed in several southeastern Wisconsin towns and more than 400,000 customers were left in the dark across the Midwest as the first day of a multiday severe weather siege spawned tornadoes and dozens of reports of wind damage. Some of the worst damage was seen in the towns of Mayville and Juneau, Wisconsin, some 50 miles northwest of Milwaukee. People were reportedly trapped in damaged structures and had to be rescued after the powerful storms swept through. "The south side of the city has undergone substantial damagefrom a potential tornado," Mayville mayor Rob Boelk said in a statement released Thursday night. "Residential homes and factories have sustained significant destruction." So far, there have been no reports of deaths from these storms. (MORE:Tornado Threat Will Persist Into Next Week) The storms moved eastward through the Midwest on Thursday evening, and with those wind damage reports came widespread power outages. According toPowerOutage.us, more than 425,000 homes and businesses were without power early Friday morning. More than half of those outages were in Michigan, where more than 250,000 customers had no power Friday morning. Indiana had another 65,000 customers in the dark, illustrating how strong the winds remained as these storms marched east. The timing couldn't have been worse for tens of thousands of Beyonce fans to descend on Chicago's Soldier Field for Thursday night's concert as part of her Cowboy Carter Tour. People scrambled to the concourses to find shelter as the storms rolled through and the show was delayed by more than two hours. Despite the howling wind and fierce rain, no injuries were reported and the showbegan at about 10:15 p.m. local time Thursday night, according to the Chicago Sun Times.