( CNN ) -- Thousands remained without power Saturday in the metro Detroit area after powerful thunderstorms the previous night that left one man dead and frightened others in its path . The man was killed in the Detroit suburb of Warren after being electrocuted by a fallen power line in his backyard , according to CNN affiliate WDIV-TV . The victim did not realize the wire was down , the TV station said . DTE Energy reported 230,000 customers without electricity as of 9 p.m. Saturday , down from 385,000 at the height of the outage . Others attending church festivals around the region got a scare when high winds caused tents to collapse , WDIV reported . Larry Tomenello recalled people yelling as strong winds literally picked up a massive tent over the St. Hubert 's Parish Festival in Harrison Township , prompting a frenetic push to get everyone out before 100-pound beams came crashing down . The Rev . Paul Ballien described a similar situation at his church in Dearborn Heights . `` The tent ... just collapsed over on one side , '' Ballien told WDIV . `` And I know there were people under there , and I just could n't do anything about it . '' DTE Energy said wind gusts as high as 75 mph downed more than 2,000 power lines across southeastern Michigan . More than 600 personnel from as far away as Tennessee , Wisconsin and New York worked 16-hour shifts alongside tree-trimming crews to bring back service , according to the utility . `` The vast majority of customers will have their power restored by late Monday night , but ... some small clusters of customers ... . probably will not be restored until Tuesday or Wednesday , '' DTE Energy said . At least the weather cooperated in one respect Saturday in Michigan : Conditions were comfortable , with temperatures peaking in the mid-70s and relatively light winds . The same storm system that caused the extensive power outages in Michigan moved through the Northeast on Saturday . Areas from eastern Pennsylvania all the way north to Maine could see powerful winds and large hail , said CNN meteorologist Todd Borek . The National Weather Service issued severe thunderstorm watches and warnings from northern Virginia up the East Coast , including Philadelphia , New York and Boston . There 's also a small chance for an isolated tornado , Borek said , but hail and damaging winds are the main threat . Hundreds dead in flooding across Asia . CNN 's Carma Hassan contributed to this report .
Tents collapsed during church festivals in Detroit . More than 600 people from several states try to restore power , utility says . Man in Detroit suburb trapped in backyard by downed power line . DTE Energy says 75-mph winds have downed 2,000 power lines in southeastern Michigan .