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Save communities by thinning forests or hardening structures?

Moose Fire August 2, 2022 in Montana
The result of aerial ignition on the Moose Fire August 2, 2022 in Idaho. By Mike McMillan for the USFS.

Bloomberg Law has an interesting article by Bobby Magill about efforts to reduce the wildfire threat to homes. It discusses and compares forest thinning vs. hardening structures. Here are excerpts, but read the entire article.


Congress is spending billions to save communities from Western megafires by thinning large swaths of forests even as scientists say climate change-driven drought and heat are too extreme for it to work.

The money would be better spent thinning woods closest to homes and shoring up houses against embers raining down from firestorms, according to academics, former agency officials, and others who study wildfires.

“If our goal is to keep homes and communities from burning, the experts are telling us to focus from the home outwards. First, harden the home so it is less likely to ignite,” said Beverly Law, an emeritus professor of forestry at Oregon State University.

Megafires are sustained by drought and heat, and “no amount of thinning treatment will prevent such fires from occurring,” she said.

[…]

No Scientific Consensus
As the federal government focuses on forest thinning, no scientific consensus exists that removing vegetation, especially at a landscape-scale, will save communities in the paths of firestorms amid the West’s historic 23-year drought.

The science is clear that “there isn’t a great connection between home loss and these fuel treatments,” though they sometimes help firefighters gain a foothold on some fires, Cheng said.

Randy Moore, the Forest Service chief, said the agency is confident that as homes are built deeper and deeper into the woods, its research shows that removing “overstocked” trees is the best way to protect them.

“We know where we do nothing, or where we do a little, we’re seeing the evidence out on the landscape,” Moore said, referring to recent megafires. “We feel compelled to do something.”

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