The wildland-urban interface (WUI) is the region where houses are intermingled with wildland vegetation, and is often the area where wildfire impacts are most severe. In the US, WUI regions have expanded rapidly, increasing the risk of severe fire for those communities. This risk affects a significant number of people, and challenges local emergency management and community leaders to plan for and mitigate such a hazard. In WUI regions, the fires are typically started by humans rather than naturally (i.e. lightning), and climate change will likely increase fire severity and frequency in the future.

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