As of Sunday, the King Fire was 89 percent contained, according to Cal Fire.

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Crews made progress toward putting the massive wildfire out for good as additional rain and high humidity aided their efforts, according to the Associated Press. 

U.S. Forest Service spokesman Michael Williams stated that the 2-week-old blaze had burned almost 152 square miles of a heavily-forested region east of Sacramento. 

More than 4,800 firefighters remained on the scene as fire suppression and repair teams assessed the damage, state fire spokesman Capt. Tom Piranio said.  

(MORE: Here's How Long It Takes For a Wildfire Burn Scar to Heal)

"We're looking to go deep into the terrain and really focus on mopping up those hot spots and smoldering areas," Piranio said. He added that the suppression and repair teams will soon start creating a strategy to remove dead or weaken trees and prevent ash, mud and other debris from polluting the waterways.

The blaze, which has cost more than $53 million to fight, has destroyed about a dozen homes and nearly 70 other structures near Pollock Pines in El Dorado County.

A man charged with starting the fire, Wayne Allen Huntsman, 37, pleaded not guilty to arson. He remains in the El Dorado County jail on $10 million bail.

MORE ON WEATHER.COM: Images of the King Fire and other California Wildfires