Wildland-urban interface (WUI) areas, where houses and other development meet or mix with undeveloped natural areas, are places of transition, change, and great fire danger. Wildland fires have recently been in the news for burning down rural towns, second homes, and businesses in many states, especially the drought-stricken West. The fires create smoke that endangers wildlife and causes visibility and health problems for people living miles away. New development and roads in the WUI also introduce or spread invasive plants and animals to natural areas. Knowledge of WUI locations is extremely useful for policy makers, land managers, fire managers, and others. Forest Service scientists studied the WUI in the United States for more than 10 years, developed and refined a scientifically based definition of the WUI, and created maps that show past, present, and projected future WUI locations. A new user-friendly atlas and related data files provide valuable information for anyone who wants to learn about WUI locations at the local, state, or national scale. The atlas has attracted media attention from local, national, and international outlets including USA Today, Science Daily, and public radio.