A Cal Fire investigation of the October 2017 wildfires that ravaged Napa County found windblown trees and tree limbs to blame for the Atlas and Partrick/Nuns fires. According to the investigation, the trees fell into PG&E power lines and started the fires. Pacific Gas & Electric settled with nine counties and cities affected by the wildfires, following a lawsuit that alleged negligent maintenance of electrical infrastructure. The $415 million settlement will be divided between the nine jurisdictions, with $34 million to be distributed to Napa County and $6.3 million to the City of Napa, specifically.