Hi. It is scary to see them bent over like that. Have had it happen a number of times, even to a pretty decent sized 7 year old tree - often because it seems my
apple trees loose their leaves later than everyone else so they always seem to have leaves to catch those wet snows and weigh them down. I had one occasion when we had an ice storm and I had to take the sledge hammer to break the ice off the bent over leaves and limbs to get them off the ground. Been lucky that nothing has ever broken and they seem to get through the rest of the winter OK.
So yeah, knocking off the snow so they can stand back up is about all you can do.