VIDEO: As the fire continues to grow, different layers of ecology, tough terrain and wind are all affecting the way firefighters can stop the spread.
For a wild land firefighter, the different habitats living on the Catalina Mountains, from the brush to the oak trees, all act as different fuel types.
This can affect how a fire burns. For example, brush like grass will burn a lot easier than the bark of an oak tree.
However, the invasive species buffelgrass is affecting it a more negative way, because it burns at such a high intensity.
"(The fire) It doesn’t bode well for those areas with a lot of buffelgrass, that’s probably where you would have had highest intensity of fire and the greatest impact to a species such as saguaro," Wildlife Biologist at the Santa Catalina Ranger District Joshua Taiz said.
Taiz said Sonora desert scrub doesn't do well in fires, and as of right now, the future for this burned ecology in the Bighorn Fire in uncertain.