meaning of dreams collapse house

i was in my parents living room with my mum dad and sister. We saw out of the window a red souble decker bus flying through the air as if it had been catapulted from miles away. As we all looked out of the window we realised it was going to crash near us. It crashed into the house semi-detached next door virtually destroying it. My parents house was fine but we thought we had better get out. We sat in the car over the road and a police man came up saying you can't go back in as the house it likely to collapse too. We watched for a while and the house did collapse and i was crying at losing childhood and family photos etc but we were all safe.