Rake the Roof

I have heard the expression raise the roof but I have never heard rake the roof. My son sent me a picture of him raking his roof. Normally New England gets about 36 inches of snow a year, but this year they are up to 90 inches. The snow is piling up on the roof and needs to be removed. He bought a roof rake which extends probably over 50 feet in length, and raked his roof. He was standing waist high in snow scraping his roof. It looked surreal. There is more snow on the way. I wish it would end.