“Fundamentally, the science is very, very simple,” says Philip B. Duffy, a climate scientist who is president of the Woodwell Climate Research Center in Falmouth, Massachusetts. “Warmer and drier conditions create drier fuel. What would have been a fire easily extinguished now just grows very quickly and becomes out of control.”
This year’s fires have been made worse by a record-shattering heat wave. And there are other reasons, beyond climate change, why wildfires have been getting more deadly. For one, people are increasingly moving into areas near forests, known as the wildland-urban interface, which are inclined to burn.
Experts say past fire suppression also plays a part: For decades, the federal policy was to rapidly put out all wildfires rather than allow forests and grasslands to burn from time to time. Because of that, there’s a lot more vegetation to fuel destructive fires. Still, scientists say, the role climate change is playing is clear.
President Trump visited California in September to survey the damage. He praised the thousands of firefighters who had been working day and night to contain the flames.
But the president insisted that poor forest management was to blame, declining to mention climate change. Throughout President Trump’s term, he has called climate change a “hoax” and sought to roll back many policies designed to lower greenhouse gas emissions, such as regulations on automobile emissions. He says these regulations hurt the economy. But many of the president’s critics say that getting rid of them has made the wildfire situation worse.