I am lost in a snowstorm. The wind shrieks, blows stinging sheets of snow into my eyes. I stagger through layers of shifting white. I call for help but the wind drowns my cries

This figuritve language is describing Amir's feelings of being lost while Hassan is being raped.  The wind shrieks because Amir does not want to hear what he is hearing. The wind hurts his eyes because he does not want to see what he is seeing. Amir feels lost because he does not know what to do.