Cal Fire says the total blaze is now 30% contained.
He said it's "being diverted into the Pacific Ocean".
Scott McLean, a deputy chief with the California Department of Forestry and Fire Protection, described the flames as "extremely fast, extremely aggressive, extremely dangerous".
The White House did not immediately respond to a request for evidence to support Trump's tweet.
As of Monday, the Carr Fire had consumed 163,207 acres and was 45 percent contained.
Collectively dubbed the Mendocino Complex, the wildfires have burned through 283,800 acres (114,850 hectares) - an area almost the size of the sprawling city of Los Angeles - and are just 30 per cent contained, according to state fire authority CalFire.
The Carr Fire has displaced more than 40,000 people, while the Mendocino Complex Fire has grown to the fifth-largest in state history.
Comprised of the River and Ranch fires, the Mendocino Complex has now surpassed last year's Thomas Fire, which torched 281,893 acres in Ventura and Santa Barbara counties, as the largest fire in California history.
President Trump claimed in a tweet that California's wildfires are "made so much worse by the bad environmental laws" which prevent firefighters from accessing water. And befuddled scientists who spoke with TIME could only guess at what Trump meant in his tweets.
More than 129 million trees have died since 2010 in California, a problem that state officials trace back to climate change. "Environmental laws about water have nothing to do with it from my perspective". He added in the tweet that water "is being diverted into the Pacific Ocean". Jerry Brown called on President Trump to help the state fight and recover from the wildfires.
Authorities said 16 other major fires continued across the state in what Gov.
More than 400 square miles have been scorched, making this California's second largest fire on record. However, the River Fire remained at 47,663 acres and 50-percent containment. "It's really a head-scratcher".
Before arriving at the fires, the Aussies and Kiwis went through a brief training period at the NIFC headquarters in Boise, Bilbao said. But clearing trees is more commonly associated with commercial logging practices, not fire management.
Fire officials have condemned the presidents comments, saying that they are not in fact struggling to source enough water to contain the fires.
As for the northern section of the fire, Blankenheim said it "continues to progress toward Lake Pillsbury, and we're building line on Middle Mountain Road and working toward the Eel River, trying to cut it off before it gets to the community of Lake Pillsbury". "Anything he's talking about doing would come nowhere near addressing this problem".
"I'm not sure what he was recommending", University of California, Merced professor LeRoy Westerling told the San Francisco Chronicle on Sunday.
The complex of fires, which has burned 75 homes, has been less destructive to property than some of the other wildfires in the state because it is mostly raging in remote areas. "These kinds of awful situations bring people together, regardless of the lesser kind of ideologies and partisan considerations", Brown said in a statement.