Wildfires are caused either by humans or nature. 85% of wildfires are preventable because they are caused by humans. Humans cause wildfires through unattended campfires, discarded debris, negligent use of flammable or combustible materials, and even intentional arson. But nature may also cause wildfires on its own during dry thunderstorms. Dry thunderstorms are thunderstorms that result in very little rain. Without enough rain, lightning bolts occurring during the thunderstorms can strike flammable materials on the ground, such as wood, and start a fire. If there are also high winds, any flames that ignite from a lightning strike can be quickly spread across a large area.
North Dakota has about 1,800 fire incidents per year. Common causes of North Dakota fires include lightning, smoking, sparks from trains or farm machinery, unattended cooking fires, hazardous materials spills, and other accidents.