WALDEN - Allister Rivera checks the mailbox each afternoon when he arrives home from work.Then he walks in the front door of his raised-ranch home on Brook Road, where he's greeted by splintered rafters that jut down into the kitchen, pointing at tufts of insulation on the floor.He checks on the home daily, in disarray and unlivable, before heading off to his hotel.The oak tree in Melanie and Allister Rivera’s backyard gave way around 4:15 p.m.