Since being ignited on 27 July they have devastated 283,000 acres (443.4 square miles).
The amount of acreage burned is nearly 10 times the size of San Francisco (47 square miles) and almost the size of Los Angeles (469 square miles).
RUSH FIRE (Lassen County), August 2012 Acres burned: 271,911 in California (43,666 in Nevada) Structures destroyed: 0 Deaths: 0 5. The Mendocino Complex Fire jumped creeks, firelines and roads this weekend, and is already the second-largest wildfire in the state's history, as judged by acres burned.
Experts have said this has meant fires spreading more quickly from rural areas to urban developments.
Trump's claim "is so physically impossible, you don't even really want to respond", Lund said.
The River and Ranch fires, which together are called the Mendocino Complex, blackened an area of 273,660 acres (110,750 hectares). That fire ended up burning 281,893 acres before being contained. The expansive fire is burning north of Clear Lake and through the Mendocino National Forest.
This smaller blaze has consumed 48,663 acres and is considered to be 58% contained. Firefighters aren't running out of water as they battle the blazes, experts said.
In this file photo taken on August 04, 2018 Resident Lane Lawder carries a water bucket while fighting to save his home from the Ranch Fire burning down New Long Valley Rd near Clearlake Oaks, California.
Gilless said the reason California's wildfires are so destructive this year is the state's "high heat, low relative humidity, high wind speeds and high fuel loading".
On the two fires 75 residences have been destroyed and another 9,300 remain threatened. It has not resulted in any fatalities to date.
Here & Now's Robin Young speaks with Hanna Kuyper of Redding, who lost her home in the fire.
How did the Mendocino Complex Fire get so big?
The Mendocino Complex was still growing as it broke the record set last December. The dry, hot weather that climate change brings adds to the dried tinder and risk.
Typically, temperatures dip and humidity rises overnight, giving fire crews a window to slow down the spread of the wildfires. Officials are investigating the cause of both.
The blaze is the deadliest of the fires racing through the state. Sparks from power lines have also been known to spur massive infernos, as well as lightening.
Aircraft are dropping retardant across ridgelines to keep fire from racing down hillsides toward residential communities.
"There are also significant terrain hazards for firefighters".
But that's "a totally separate issue" from fire management, said William Stewart, a forestry specialist at the University of California at Berkeley.