As of late fall 2018, there have been at least nine arson fires at construction sites in Oakland and Emeryville, California. In all cases, the fires destroyed sites where multi-unit housing was being built. There has been a number of theories regarding who is responsible for the fires and the motivations behind them, but there is little evidence to prove any of these theories. In late November 2018, one person was arrested and charged with causing one fire, though the case has yet to move forward. The other fires and their causes and perpetrators remain mysteries.