Side/rear Glass problems of the 2006 Toyota RAV4

Sat, July 1, 2006 the rear window of my 2006 Toyota Rav4 simply blewout sitting in our driveway. There was no traffic, precipitation or wind and temp hovered 75-80 degrees. Most of glass remained loosely intact but was all shattered with a medium size hole in the right side of the rear window, with small fragments found outside of window. Small pieces of glass continued to fall out. The car had been sitting cold (not running) since the evening prior (6:30pm) and was in partly shaded area. Both rear driver/ passenger side windows lowered about 2 inches to circulate air. Nothing was in car to contribute to internal pressure and nothing hit the car as I was witness to this event as it occurred. Driveway is on a hill; car faced forward and angled down the hill toward garage (car rear end highest). Large glass pieces found mostly outside of car just below window with some larger pieces laying on outside of rear door with smaller fragments on the ground below. Small glass fragments found inside car below window. Pictures taken. Toyota contacted and questioned as to next step. Toyota representative offered nothing as this was holiday weekend and nothing was available,according to Toyota. Auto glass repair companies called and no one available due to holiday. Insurance company called, given same story again! Toyota called again. Can't leave car sit with broken rear window and we expect rain. Asked about knocking rest of glass out as the glass needed to be cleaned up and opening needed to be secured. I explained I couldn't drive the car, it was unsafe to drive & towing was not an option as nearest Toyota dealer didn't have towing capacity. . . And closed in an hour. Knocked rest of glass out and taped up rear window opening. Drove to dealer mon morning to leave rav for repair and secured rental car. Told my car would not be looked at until wed. Thur my car looked at and new window ordered and hoped to be here in a week or so. Broken glass disposed of.