August noon out by the fairgrounds, cicadas going like a saw in the elms and the heat standing perfectly still over the pavement. FAS AND SERVICE LLC is mowing anyway, moving property to property, keeping whole rows of yards from getting away from anybody. Cutting, trimming and clearing the clippings — nothing elaborate, just done on schedule and carried all the way into the corners. The reward comes at the end of a hot run, looking back down a street where every lot sits at the same height. Summers in Mount Vernon are long, and grass does not take days off.