Flood, fire and drought fuelled by climate change could take a massive bite out of the US federal budget per year by the end of the century, the White House said in its first-ever such assessment on Sunday.

The Office of Management and Budget assessment, tasked by President Joe Biden last May, found the upper range of climate change's hit to the budget by the end of the century could total 7.1 percent annual revenue loss, equal to US$2 trillion (RM8.43 trillion) a year in today's dollars...