The Mercer Fire scorches saguaros in the Santa Catalina Mountains. The lightning-sparked blaze was the first known wildfire in the Catalinas to be primarily fueled by buffelgrass. Courtesy of ...

Buffelgrass is a drought- tolerant African grass introduced into Arizona for grazing. Why is it a problem? Buffelgrass contributes to extremely hot, fast-moving wildfires that could endanger lives ...

The majority of comments reviewed by The Post were positive, though some visitors complained that there were too many mosquitos and “not enough moose.” ...

Wildfires can burn and spread differently depending on what vegetation they burn. The two fires in northern Arizona have varied landscapes. Ponderosa pine trees grow near the North Rim of the Grand ...

Both fires burning north of the Grand Canyon were ignited by lightning, but the landscapes are different.

The two wildfires burning in northern Arizona were both ignited by lightning strikes, but the vegetation fueling the blazes can lead to different wildfire characteristics and response strategies from ...