Hundreds of sites that hold some of the nation's most hazardous materials are threatened by climate change, according to findings from the nonpartisan watchdog arm of the federal government.

A report from the Government Accountability Office said the Environmental Protection Agency could do more to protect the sites from wildfires, flooding and other disasters influenced by climate change. It comes as the Trump administration continues to express skepticism about climate change in general and has worked to roll back regulations seeking to mitigate its effects.

At least 945 sites – or about 60% of Superfund sites in the U.S. that are not owned by federal agencies – are vulnerable to floods, storm surges, wildfires or sea level rise, according to the GAO.

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The GAO recommended EPA make clear that addressing the impacts of climate change at Superfund sites aligns with the agency's goals and objectives.

"Without clarifying this alignment, EPA cannot ensure that senior officials will take an active role in strategic planning and accountability for managing these risks," the report said.

EPA Assistant Administrator Peter Wright responded to the report, saying the agency believes the program's "existing processes and resources adequately ensure that risks and any effects of severe weather events, that may increase in intensity, duration, or frequency, are woven into risk assessments" at the sites.

The report drew the attention of the top Democrat on the Senate's Environment and Public Works Committee.

"By refusing to address the worsening impacts of climate change at our nation's Superfund sites – from flooding to wildfires to more frequent extreme weather events – the EPA is putting public health at risk," tweeted Sen. Tom Carper of Delaware.

Another government report on Monday critiqued the agency's Superfund program. EPA's inspector general found that a Superfund site in Anaconda, Montana, is selling bags of mining waste materials known as slag as souvenirs.

"As a result of slag being used or sold as a souvenir, the public may be at risk of exposure to contamination," the IG's management alert said about the Anaconda Co. Smelter Superfund Site.