In San Bernardino County, the roof rat is the species which lives in our residential areas, mostly under piles of wood and debris, in garages, attics, and storage areas. Keep wood piles, lumber and household items neatly stacked at least 18 inches above the ground and away from walls and fences. Clean up and haul away junk and debris and trim trees, bushes, and vines at least four feet away from your roof. Pet food, fruit trees, open trash cans and vegetable gardens initially attract rats; then they find shelter. View What is a Vector? for more information.