This webinar draws on more than a century of fire records, from 1910 to 2021, combined with climate and weather data to better understand what shapes fire behavior across different ecoregions. The presentation introduces a framework that distinguishes between immediate drivers, such as fuel conditions and ignition sources, and underlying factors like long-term climate patterns and land use. Findings show that wildfire drivers vary widely across California. In northern forested regions, fire activity is closely linked to fuel aridity tied to climate conditions, along with the accumulation of woody fuels influenced by fire suppression. In contrast, lower elevation grassland and foothill areas tend to experience more burning following wetter winter and spring seasons, when increased plant growth creates abundant fine fuels. The webinar will also examine how ignition sources differ across landscapes.…