My township vacuums up leaves curbside from October to mid November. Usually, it works out fine. But one year, the week before the last pickup, we had a heavy snowfall. When the plows came through, they pushed piles of snow on to the piles of leaves. And then it never melted off. In fact we had weekly snow falls accumulating on what was already there. The township had to make a leaf run in April when they finally got melted out of the snow. What a mess! Lawns were messed up not only because of leaves, but the snow cut off their sunlight too. Welcome to the northern states!