NEVADA COUNTY --
On day four of the Lowell Fire in Nevada and Placer counties, flames covered more than 2,300 acres with 40 percent containment.
Cal Fire says a lot of resources were dedicated to this fire, which helped prevent it from exploding in size.
"We always have an aggressive initial attack. We want to put as many resources on a fire as possible," said Cal Fire spokesperson Daniel Berlant.
Tuesday, triple-digit heat created an added challenge for the 2,300 firefighters on the ground. There's even more support in the air.
Berlant says sometimes an aggressive attack is not enough to stand up to Mother Nature.
"The weather conditions like we experienced over the weekend, despite how many resources we throw at it, continue to allow fires like this to grow and to grow very rapidly," Berlant said.
This is what Cal Fire was expecting this year. Crews trained early and there's extra manpower.
"We have additional firefighters, we've been able to staff more resources because of the governor's drought state of emergency," Berlant said.
Those resources have helped protect the nearly 2,000 buildings in the path of the Lowell Fire.
Nevada County resident Rick Frazer has been watching the smoke from afar. He's used it as a moment to teach an important lesson to his grandson.
"Telling him about fire safety and this is the reason that you've gotta watch your campfires and be safe," Frazer said.
The cause of the Lowell Fire is still under investigation.
Four firefighters were hurt over the weekend. One remains in the hospital.