"California wildfires are being magnified & made so much worse by the bad environmental laws which aren't allowing massive amount of readily available water to be properly utilized". He added in the tweet that water "is being diverted into the Pacific Ocean".
The fire comes as California firefighters continue to struggle to contain the deadly Carr Fire to the north of the Mendocino Fires.
That system, a combination of the Ranch Fire and the River Fire, totals more than 250,000 acres about 100 miles north of San Francisco.
The Australian and New Zealand firefighters who arrived in the US last weekend to help fight the wildfires spreading throughout the country have been deployed to blazes in Northern California and OR, the National Interagency Fire Center said Monday.
In fact, "we have plenty of water to fight these wildfires, but let's be clear: It's our changing climate that is leading to more severe and destructive fires", Daniel Berlant, CalFire assistant deputy director, told The New York Times.
The Mendocino Complex is now considered the sixth-largest wildfire in California history. Firefighting aircraft can dip in and out of cattle ponds or other small bodies of water to scoop up water for dropping and spraying on flames.
No one has been injured in the Mendocino Complex Fire, which consists of two fires - the Ranch Fire and the River Fire - burning around Clear Lake, in Northern California.
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Firefighters from Australia and New Zealand are scheduled to arrive in Northern California today to help battle two huge blazes that were about half contained over the weekend. The entire so-called Mendocino Complex Fire is now one of the largest on record in the state, officials said.
Elsewhere in California, evacuations were ordered for cabins in Cleveland National Forest canyons in Orange County on Monday afternoon after a blaze broke out and quickly spread to span 700 acres (283 hectares).
Critics said his tweets ignored the greater wildfire frequency and severity experienced in California and other Western states from extreme drought and sustained periods of hot, dry weather, in keeping with the forecasts of climate scientists. Denham hosted a visit to the area last week by Interior Secretary Ryan Zinke, whose agency has obligingly attacked state water policies. Trump contended Monday that water could be used for "fires, farming and everything else". "Fast Federal govt. approvals." - tweet Monday.
Over 14,000 firefighters are now battling the wildfires across California, and fire crews from New Zealand and Australia are travelling to the state to support the effort.
He said it's "being diverted into the Pacific Ocean".
"I can remember a couple of years ago when we saw 10 to 12,000 firefighters in the states of California, Oregon and Washington and never the 14,000 we see now", he said.
Denham has spoken out to the Trump administration against what he sees as state efforts to "push more fresh water out to the ocean", Carlin said.