By: Gwen Moran All it takes is for one ember to fall on your roof. Don't let it happen. How do most homes ignite during a wildfire? A floating ember or piece of burning wood touches down on a roof, gutter, in a vent, under a deck, or on a porch and ignites leaves and debris, says the National Fire Protection Association. Or else, a surface fire simply takes the fast lane to your home via dry...