Mountainsides near the 79 Freeway were seen charred by the wildfires as early as 6 a.m. Sunday morning, and authorities confirmed that flames did briefly cross the freeway late Saturday night before crews were able to contain them.

The two biggest challenges firefighters face are accessing the remote area that the fire is spreading through and mitigating the effects of the large amounts of dry brush in the area, but fighting the blaze at night is proving to be a key tactic in extinguishing it.

“As the earth cools down, the wind will go in the reverse direction of where it was coming to,” said Cal Fire Deputy Chief Lucas Spelman. “In this area we’ve been having fires over and over the last few weeks because of the heat and how dry it is.”