SACRAMENTO, Calif. (AP) — Democratic Gov. Jerry Brown helped his party become dominant in California politics during his eight years leading the nation’s most populous state, and less than a month before leaving office, he is predicting it will be difficult for his successor to control Democrats’ hunger for more spending and rules.

The leader of California Democrats has kept lawmakers in check by limiting spending on social programs in favor of saving it to protect against a future economic downtown. He sometimes butted heads with legislative leaders, warning spending too much now could hurt taxpayers or require budget cuts later.

Democrats hold all statewide offices and expanded their supermajority in the Legislature last month, allowing them to approve tax hikes and virtually any law without Republican support.

“I’d say we’re in for contentious times and for too many rules, too many constricting mandates and probably too much spending,” Brown told the Associated Press in an interview Tuesday.

He said Gov.-elect Gavin Newsom may have a hard time keeping fellow Democrats in check because “he’s got to please some of these groups enough of the time to still be viable as a political leader.”

In the interview, Brown, 80, called for more blunt discussions about the danger of wildfires to force officials and residents to act, pushed back against critics who say he’s too friendly to oil companies, and chided world leaders for failing to tackle climate change with urgency.

He leaves office Jan. 7 after wrapping up a record four terms, first from 1975 to 1983 and again since 2011.

The governor’s comments on Democratic priorities reflect the more frugal attitude he brought to Sacramento. He entered office with a $27 billion deficit and leaves a nearly $15 billion rainy day fund and a surplus.

Brown, however, has backed his own expensive plans. He used Democratic majorities to pass a controversial gas tax increase for road maintenance and has steadfastly defended a $77 billion project to build a high-speed rail line between Los Angeles and San Francisco that’s seen repeated delays and cost overruns.

While he warned against overspending, he said he expected dissonant voices among the Democratic majority — a result of what he called the party’s greater diversity of people and ideas. Republicans, he said, hold a “slavish adherence” to a limited agenda and President Donald Trump.

Brown is leaving office on the heels of the deadliest U.S. wildfire in a century. Flames tore through the town of Paradise last month, killing at least 86 people and destroying more than 12,000 homes. He’s blamed climate change for more destructive blazes in recent years and warned things will worsen.

The governor called the need to limit building in areas at high risk for wildfires “obvious” but said it’s “politically painful” to implement when people want to rebuild their homes and developers see opportunities.

People who choose to live in high-risk areas need to plan escape routes, build cellars and manage vegetation, he said. And the state must provide more information about the true danger of wildfires, he said.

“I don’t think governments lay out for people the stark warning: You may die in this particular environment,” Brown said.

Wildfires offer Brown an opportunity to call for swifter action against climate change, which is making California drier and more prone to flames. He’s urged action beyond California, working with the U.N., creating a global coalition to reduce climate emissions and holding meetings in China and Russia.

He’s working on a climate-focused partnership between the University of California system and Tsinghau University in Beijing he can dive in to when he leaves office, he said. His spokesman Evan Westrup declined to provide more details.

Critics say Brown has a blind spot when it comes to oil because he keeps allowing drilling permits and new wells. Brown scoffs at the claims, saying the state’s overall oil production has dropped steadily since the 1980s. He says simply stopping it won’t halt demand. He’s pushed to make electric vehicles more accessible and worked to improve public transit.

“The problem is burning oil, consuming it,” he said. “The only way you stop that is electric cars, land use so you don’t have to travel so far and other forms of reducing carbon emissions.”

He said climate change advocates still must be careful to not overplay their hand. He pointed to a planned fuel tax in France that led to violent protests. French President Emmanuel Macron early this month backed down on the tax, which critics said would hurt the working class.

Brown said Macron didn’t add enough rebates or tax credits to cushion the blow for low-income people.

“You have to get the right idea, you have to be careful and nuanced and then you have to be very skillful in the execution, and you can fail in many different ways,” Brown said.

In a common theme, he ended the interview with a global wake-up call.

“The threat of nuclear annihilation and climate change on a permanent basis looms, and therefore it is time for new leaders to rise up and make the case and mobilize the people for what needs to be done,” he said. “What needs to be done is unprecedented, and therein lies the dilemma.”