1921 Mari wildfires
In the summer of 1921, deadly wildfires occurred in the Mari Autonomous Oblast of the Russian Soviet Federative Socialist Republic, burning approximately 2,660 square kilometers of pine forests and dealing considerable damage to the local industry, which had already been devastated by the Povolzhye famine. Overall, the wildfires caused in total 35 deaths, 1000 cattle deaths, and the destruction of 60 villages.