This is a photo that really makes you think about life. Just imagine living somewhere so cold (especially indoors - there was probably no heating here) that the water that sits inside the toilet actually freezes. The person that took this photo was probably wondering why he can't flush after using the toilet, and after removing the top cap he got his reason.
It seems that after he saw what was happening he took an electric heated in order get things flowing. It is a well-known fact that leaving bathrooms and kitchens this cold can cause all kinds of serious problems - including pipes that can break due to the expanding, freezing water. The problem is that water is not compressible, so making it turn to ice will always cause the surrounding areas to crack.