Rear Window Wiper Washer problems of the 2011 Chevrolet Traverse

My 2011 chevy Traverse was parked in the garage for over an hour when my husband walked in the garage and heard a crackling noise. He began walking around trying to find the noise and saw the back window of the Traverse slowing cracking. When he first observed - there was no holes - only cracking. The cracking continued continued for unknown length of time. Two holes in the center formed as glass fell out. By the next morning, one large hole in the center had formed. The glass appears to bulge out from the inside of the car. The edges of the glass all around the perimeter of the window are gone. Temp outside was around 72 degrees. Nothing unusual about weather or temp on this day.