Idaho
Wildfires are increasing toxic mercury in streams in Idaho, Oregon, Washington, study finds
Wildfires have been burning across Idaho this summer, and their list of harmful impacts is long, from worsening health conditions because of smoke to challenges recovering millions in costs to fight them.
But a recent U.S. Geological Survey has added another bad side effect to the list: the rise of a toxic chemical.
The study, which took place between 2021 and 2022, sampled 57 streams at the beginning of river systems in Idaho, Oregon and Washington for mercury, a chemical that can damage the human nervous system at high concentrations. In both water and sediment from the streams, one-year post-fire, mercury concentrations were higher.
Concentrations of methylmercury, the most toxic form of mercury that’s made when microbes add carbon to mercury, were also 178% higher in water from burned streams. Insects that filtered stream water or ate debris also had higher levels. The compound becomes dangerous as it accumulates in animals over time and gets absorbed by tissues in the body, according to the World Health Organization.
“There hasn’t been a lot of work done on the effects of wildfire on mercury,” Austin Baldwin, a USGS research hydrologist who led the study, told the Idaho Statesman. “With wildfires increasing in both severity and frequency, there was interest with me and my co-authors on knowing what are the effects.”
Baldwin said that when wildfires come through an area, they burn vegetation, which loosens mercury-containing soil and causes erosion into streams and mercury contamination. More studies would need to be done to understand if mercury levels after wildfires are high enough to be a concern for humans, he added.
Mercury levels likely won’t stay high forever and will taper off with major rainfall or the first snow melt after the fire, Baldwin said.
While the best solution to keep mercury out of streams would be preventing wildfires, Baldwin thinks prescribed burns could help mitigate some of the effects. The USGS study found mercury concentrations went up more in areas where wildfires were worse.
Prescribed burns, which are small fires set intentionally, can reduce the future risk of high-intensity fires by 64%, according to a study by Columbia and Stanford universities.
“If you can lower burn severities, you can also lower mercury,” Baldwin said.
When people are exposed to methylmercury, it often happens through fish consumption.
The Idaho Department of Health and Welfare’s Fish Consumption Advisory Project regularly tests fish in areas commonly contaminated with mercury. When mercury levels are too high in a species, the state agency issues advisories to avoid eating the species, said Drew Pendleton, the state toxicologist.
Many of the areas that cause fish advisories in Idaho are related to mining, and Pendleton is not “too concerned” about mercury increases from the wildfires. But the research could help inform the state on future sites for testing, he said.
Pendleton recommends visiting the Center for Disease Control and Prevention and Health and Welfare websites to check for advisories on mercury exposure and learn the best methods to stay safe.
2024 The Idaho Statesman. Distributed by Tribune Content Agency, LLC.
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Wildfires are increasing toxic mercury in streams in Idaho, Oregon, Washington, study finds (2024, August 15)
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Idaho
You Asked: Where is the 1976 Bicentennial Time Capsule for the State of Idaho?
Idaho
“We won’t insure you”: Robie Creek homeowners struggle to get home insurance due to wildfire risks
ROBIE CREEK, Idaho — The Claremont Fire has brought wildfire risks to top of mind for neighbors living in places like Robie Creek, where residents saw Level 3 evacuations this week.
Many Idaho homeowners in rural areas like Boise County say they are having their home insurance policies dropped because of wildfire risks, leaving many scrambling to find coverage or going with none at all.
“This one was good — we knew it was coming, the one that was the Valley Fire in 2024 came up behind the hill. It was closer than this one even,” said Christian Dahlstrom, who has lived in Rocky Canyon since 2008.
WATCH | Hear from Robie Creek homeowners about being dropped from coverage with no luck getting re-insured
“We won’t insure you”: Robie Creek homeowners struggle to get home insurance due to wildfire risks
“I was insured since then until last year, so following the 2024 fire or fires, the insurance companies up here started reevaluating and they canceled a lot of folks and I was one of them,” Dahlstrom said.
He and many of his neighbors are now living without homeowners insurance because they can’t find a provider that will offer them full coverage.
“I have contacted every insurance carrier in the phonebook,” Dahlstrom said.
He said his mortgage company eventually insured the home, but only for the value of the mortgage. He could still lose everything if the home were destroyed in a fire.
“One insurance company said yep they’ll insure me but I had to take every single tree off the property. Well, then why am I living in the forest?” Dahlstrom added.
Others in Robie Creek say they are facing similar problems.
“And it’s not even a, well now you have to pay twice as much. It’s a we won’t insure you,” said Oscar Williamson.
Williamson recently bought a home in Robie Creek and said he needed insurance coverage to close on the property.
“We had gone through 40 different insurance companies to try to get it insured and nobody would ensure it they said it was in a high fire area,” Williamson said.
He nearly backed out of the purchase until his mortgage company offered limited coverage similar to Dahlstrom’s.
“You have no choice either run it without insurance or you don’t own the house,” Williamson said. “There should be an easier way of doing this.”
RELATED | “We’re all being canceled”: Idaho homeowners struggle to maintain home insurance amid wildfire risks
This is an issue affecting homeowners across the Treasure Valley and Idaho — residents in Garden Valley and the Boise Foothills have also reported losing coverage because of wildfire risk concerns.
RELATED | Idaho homeowners face insurance cancellations and rate hikes over wildfire risk
Boise Fire Chief Aaron Hummel says they’re working with partners to help reduce risks for homeowners and improve insurability.
“We also we’re trying to do our part with the Western Fire Chief Association, insurance carriers to see what can we do to use some of the contemporary tools to help mitigate some of this challenge,” Hummel said.
They are hoping to use new technology and grant funding to better protect homes in the wildland-urban interface.
“And essentially what we’re trying to do is leverage current AI technology and modeling tools to be very targeted in addressing areas that are vulnerable,” Hummel said.
You can find more information about Boise Fire’s goal to help reduce wildfire risks for homeowners here.
Idaho
Brush fire prompts GO NOW evacuations near Mesa in Adams County
ADAMS COUNTY, Idaho — A brush fire burning near Old Highway 95 and Mesa prompted GO NOW evacuations, road closures and a power outage on Thursday in Adams County.
The Adams County Sheriff’s Office ordered people in the Mesa, Kilborn, Highland and Whitman areas to leave immediately.
Mesa Lane and Kilborn Lane have been closed, and officials are asking people to stay out of the area while firefighters work.
Idaho Power reported an outage between Mesa and Fruitvale Road and said crews are on scene.
Officials said livestock threatened by the fire can be taken to the Adams County Fairgrounds.
The sheriff’s office said its business phone lines were temporarily unavailable, but 911 remained operational for emergencies. Officials later said the phone system was restored.
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