The report, prepared by more than 300 researchers in 13 USA government departments and agencies, predicts that those events will become more common and more severe if steps aren't taken "to avoid substantial damages to the us economy, environment, and human health and well-being over the coming decades". As other countries see even worse impacts than the US, Americans will feel the burden through import and export prices and in businesses that have overseas supply chains.
The Trump administration has rolled back several environmental regulations put in place during the Obama administration and has promoted the production of fossil fuels.
The paper - which was compiled at the request of Congress - gives a stark, albeit hardly apocalyptic, warning of the potentially disastrous effects that climate change could have on mankind.
"All the proposals I've seen so far that would address any of these issues would devastate the USA economy and have little or no benefit that is demonstrable from our standpoint", he said.
Incoming Democratic Rep. Alexandria Ocasio-Cortez of NY used the report to continue pushing her colleagues to take a more aggressive stance on climate policy.
Some critics have pointed out that the climate change debate is deeply entangled with special interests, from academic lobbies and advocates of more expensive "clean energy" on the one side, to the oil and manufacturing industries, on the other.
"While mitigation and adaptation efforts have expanded substantially in the last four years, they do not yet approach the scale considered necessary to avoid substantial damages to the economy, environment, and human health over the coming decades", the report said. "It's not enough to think it's 'important.' We must make it urgent", she tweeted.More news: Imran Khan rebukes Donald Trump over 'false' Osama bin Laden claims
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The report also noted that the change in climate has caused extreme weather along with changes in average climate conditions and that "future climate change is expected to further disrupt many areas of life, exacerbating existing challenges to prosperity". It says it already is.
The US climate assessment outlines the potential impacts of climate change across every sector of American society. And if it's present in a report based on the science of the past 5 years, that means the damage has already happened.
Kristian Rouz - A new report from the United States government claims that global warming could cost the U.S. economy hundreds of billions of dollars by the year 2100.
Trump has called climate change a "hoax".
It's a past-tense problem. Coral reefs, for example, which today supply one-quarter of the ocean's species, are likely doomed if even modest Carbon dioxide emissions scenarios come to pass. A threat that the people who were profiting off of it knew all about.
The NCA makes it clear that risky changes to the climate aren't just coming.