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The US western fire season starts much drier than record 2020

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As bad as last year’s record-shattering fire season was, the western U.S. starts this year’s in even worse shape.

The soil in the West is record dry for this time of year. In much of the region, plants that fuel fires are also the driest scientists have seen. The vegetation is primed to ignite, especially in the Southwest where dead juniper trees are full of flammable needles.

“It’s like having gasoline out there,” said Brian Steinhardt, forest fire zone manager for Prescott and Coconino national forests in Arizona.

A climate change-fueled megadrought of more than 20 years is making conditions that lead to fire even more dangerous, scientists said. Rainfall in the Rockies and farther west was the second lowest on record in April, according to the National Oceanic and Atmospheric Administration.

“It means that the dice are loaded toward a lot of forest fire this year,” said Park Williams, a UCLA climate and fire scientist, who calculated that soil in the western half of the nation is the driest it has been since 1895. “This summer we’re going into fire season with drier fuels than we were at this time last year.”

In addition, the western drought is deepening week by week.

In late March, less than one-third of California was suffering extreme or exceptional drought. Now more than 73% is, according to the National Drought Monitor, which is based on precipitation, temperature, soil moisture and streamflow measurements. A year ago, heading into the record-smashing 2020 fire year when more than 4% of California burned, just 3% of the state was in extreme or exceptional drought.

But the outlook is worse elsewhere.

“I think the Southwest is really primed for a bad fire season,” University of Utah fire scientist Phil Dennison said. That’s because last year’s normal monsoon season, which brings much of the year’s rainfall, never showed up. ...

 

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