When fire danger is “Extreme” fires start quickly, spread furiously, and burn intensely. The BNF has not reached “Extreme” fire danger levels since July of 2021. About the Forest Service: The Forest Service has for more than 100 years brought people and communities together to answer the call of conservation. Grounded in world-class science and technology, and rooted in communities, the Forest Service connects people to nature and to each other. The Forest Service cares for shared natural resources in ways that promote lasting economic, ecological, and social vitality.