The blaze stands at 64 percent containment, with firefighters battling through the night to maintain their control on the fire.
On Tuesday, there were 1,340 firefighters battling the blaze with 153 fire engines and 10 helicopters, 10 bulldozers and 11 water tenders.
Planes are no longer dropping bright red fire retardant on the blaze, as more of the fire has now been contained.
Residents have been allowed to return home in some areas, as control over the blaze sees mandatory evacuations lifted.
There will still be smoke rising, according to the CNF, but residents habe no need to panic.
In a statement on Twitter, the CNF said: “Residents and communities within the fire area can expect to see smoke for several weeks as large vegetation continues to burn.
“Please do not call 911 to report smoke if it occurs within the fire perimeter.
“Call only if you see a new start or flames outside the burn area.”
Ash has begun to rain across Riverside County, with health experts warning people not to expose themselves to the faling debris.
Officials have warned the ash may contain toxic chemicals, due to the array of materials burnt in the fire.
Plastics, metals and unknown items have been burnt in the blaze, which has destroyed homes and structures.
Dr Cameron Kaiser of the Riverside County Public Health Office said: “People forget we store an awful lot of toxic stuff on our properties.
“We just want people to keep in mind that, when you’re dealing with ash, you don’t know what’s burned.”
South Coast Air Quality Management warned downslope winds are predicted to push smoke and ash into valleys adjacent to the fire.
Smoke could be blown into Orange, Riverside and San Bernardino counties.
According to South Coast Air Quality Management: ”Air quality may reach unhealthy levels or higher in areas directly impacted by smoke.“
Dr Kaiser also warned the ash could cause shortness of breath and chest pains if breathed in.
He added: “Folks with heart or lung disease should not be the ones cleaning up the ash.”