2007 California wildfires
At least 9,093 separate wildfires charred 1,520,362 acres (6,152.69 km2) of land in the US state of California in 2007. Thirty of those wildfires were part of the Fall 2007 California firestorm, which burned approximately 972,147 acres (about 3,934 km2, or 1,520 mi2) of land from Santa Barbara County to the U.S.–Mexico border.
Source: Wikipedia — 2007 California wildfires (CC BY-SA 4.0)