The wildland urban interface is where wildland and residential areas intersect and can include forest or grasslands. Because of that intersection, homes near these areas may be more at-risk for wildfires. Areas in the WUI where there is a higher density of homes may be even more at-risk.
Note: Density in the WUI is just one risk factor for wildfires. Many other risk factors, including weather conditions and how well your home is mitigated may contibute to wildfire risk.
-- WUI data provided by the Colorado State Forest Service