Yes. It is well documented that bear bangers can start wildfires, particularly in dry forest, grassland, or brush conditions. Some provinces and states explicitly mention in their Bear Smart guidance not to use bangers or screamers in dry forest conditions because they can cause a fire.
A bear banger is a pyrotechnic projectile that produces an explosive report after traveling some distance. Depending on the design and where it lands, the hot pyrotechnic material can potentially ignite dry grass, needles, leaves, brush, or other fine fuels.
As an alternative, the WoodsCan Hornet rechargeable electric air horn can be safely used under even the most extreme fire conditions as it can in no way start a fire. It can be very effective up to 150 feet away from a bear which is the maximum range of bear bangers, and 8-10 times further than the effective range of bear spray.