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Long After the Maui Fires, Toxic Metals Linger in Residents’ Bodies

The toxic exposures didn’t begin with the flames. Researchers are examining how fires affected a community already harmed by plantation agriculture, development, and colonialism.

In August of 2023, a series of wildfires broke out across Maui, killing more than 100 people, destroying thousands of homes, and causing billions in damage. Noelani Ahia, who is Kanaka Maoli and co-founder of Maui Medic Healers Hui, helped mobilize nearly 600 volunteers in Lāhainā, including doctors, nurses, and therapists. 

Three years later, the housing and health crises remain acute. Maui Medic Healers Hui runs a free clinic, but Ahia wishes it had 10 more to address the community’s needs. “The fire may be out, but the catastrophe is not over by any stretch of the imagination,” she said. 

The devastation extended well beyond the lives lost and buildings destroyed. Research published last year by researchers with the University of Hawaiʻi at Mānoa’s Maui Wildfire Exposure Study, or MauiWES, found that more than 1 in 5 residents had reduced lung function.

Now, new research from the same project has found elevated levels of toxic metals in the island’s residents months after the fires, with higher exposure associated with impaired lung function. The findings offer further evidence that the health consequences of catastrophic wildfires can persist long after the flames are extinguished and the smoke clears.

“What we consider and sometimes look at as a one-time event isn’t really one-time anymore,” Alika Maunakea, who is Kanaka Maoli and co-director of MauiWES, told Grist. 

Researchers don’t yet know how much of the contamination came from the fires and how much was already present in the environment. That distinction matters as wildfires increasingly race through towns like Lāhainā and cities like Los Angeles, where burning homes, cars and infrastructure can leave contaminants that people encounter for months or years afterward.

“We have traditionally thought about wildfire exposure primarily through the lens of smoke,” Maunakea said in a press release. “But when an entire community burns, we are dealing with a much more complicated exposure environment.” Researchers must also understand what contaminants were already present, what the fire may have released, and what entered residents’ bodies, he said.

The research, which studied 1,400 adults across Maui six to 18 months after the fires, measured 24 metals in........

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