The project's Environmental Impact Report "Fire and Fuels Management" section lists numerous unmitigable significant impacts; known as Class 1 impacts, which are the highest level of impact that a project can have. The final EIR states that, "San Diego County is an extremely fire-prone landscape. Winds originating from the Great Basin, locally known as Santa Anas, create extreme fire weather conditions characterized by low humidity, sustained high-speed winds, and extremely strong gusts. Santa Ana winds typically blow from the northeast over the Peninsular Range. As the air is forced through coastal mountain passes, wind speeds of can be maintained for hours with gusts from 70 to possible (Schroeder et al., 1964). Santa Ana winds create extremely dangerous fire conditions and have been the primary driver of most of California's catastrophic wildfires. Because of the presence of dense, dry fuels and periodic Santa Ana winds, southern California has been characterized as having one of the most fire-prone landscapes in the world.